diff --git a/.github/actions/update-badge/.gitignore b/.github/actions/update-badge/.gitignore
new file mode 100644
index 00000000..3c3629e6
--- /dev/null
+++ b/.github/actions/update-badge/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/.github/actions/update-badge/README.md b/.github/actions/update-badge/README.md
new file mode 100644
index 00000000..c684ac0d
--- /dev/null
+++ b/.github/actions/update-badge/README.md
@@ -0,0 +1,21 @@
+# Update badge action
+
+This action fetches last commit time of repositories and generates the badge for advent-of-code.
+
+## Inputs
+
+### `ghToken`
+
+**Required** GitHub token
+
+### `inputFile`
+
+**Required** File path of README.md
+
+### `outputFile`
+
+**Required** File path of updated README.md
+
+## Outputs
+
+No output. The output file will be changed directly. You can use another action to commit.
diff --git a/.github/actions/update-badge/action.yml b/.github/actions/update-badge/action.yml
new file mode 100644
index 00000000..04a5e90d
--- /dev/null
+++ b/.github/actions/update-badge/action.yml
@@ -0,0 +1,17 @@
+name: 'Update badge'
+description: 'Fetches last commit time of repositories and generates badges'
+inputs:
+  ghToken:
+    description: 'GitHub token'
+    required: true
+  inputFile:
+    description: 'File path of README.md'
+    required: true
+    default: 'README.md'
+  outputFile:
+    description: 'File path of output'
+    required: true
+    default: 'README-badge.md'
+runs:
+  using: 'node12'
+  main: 'index.js'
\ No newline at end of file
diff --git a/.github/actions/update-badge/endpoint.js b/.github/actions/update-badge/endpoint.js
new file mode 100644
index 00000000..4d7cd2d2
--- /dev/null
+++ b/.github/actions/update-badge/endpoint.js
@@ -0,0 +1,90 @@
+// modifiy based on https://runkit.com/melnikow/version-from-requirements-txt
+const axios = require('axios');
+const moment = require('moment');
+
+const badgeDefaults = {
+  schemaVersion: 1,
+  label: 'last commit',
+}
+
+async function handle(octokit, { owner, repo }) {
+  let lastCommitDayStr
+  try {
+    const { data: commitList } = await Promise.race([
+      new Promise(resolve => setTimeout(resolve, 10 * 1000)),
+      octokit.repos.listCommits({
+        owner,
+        repo
+      })
+    ])
+    lastCommitDayStr = commitList[0].commit.author.date
+  } catch (e) {
+    if (e.message.indexOf('rate limit exceeded') !== -1) {
+      throw e;
+    }
+
+    console.log(`[${owner }/${repo}] ${e.message}`)
+    return { message: 'resource not available', color: 'red' }
+  }
+
+  const message = moment(lastCommitDayStr).format('YYYY-MM-DD')
+  return {
+    message,
+    color: age(message),
+  }
+}
+
+module.exports = async function invokeHandler(octokit, query) {
+  return Object.assign({}, badgeDefaults, await handle(octokit, query))
+}
+
+// copy from https://github.com/badges/shields
+function colorScale(steps, colors, reversed) {
+  if (steps === undefined) {
+    throw Error('When invoking colorScale, steps should be provided.')
+  }
+
+  const defaultColors = {
+    1: ['red', 'brightgreen'],
+    2: ['red', 'yellow', 'brightgreen'],
+    3: ['red', 'yellow', 'green', 'brightgreen'],
+    4: ['red', 'yellow', 'yellowgreen', 'green', 'brightgreen'],
+    5: ['red', 'orange', 'yellow', 'yellowgreen', 'green', 'brightgreen'],
+  }
+
+  if (typeof colors === 'undefined') {
+    if (steps.length in defaultColors) {
+      colors = defaultColors[steps.length]
+    } else {
+      throw Error(`No default colors for ${steps.length} steps.`)
+    }
+  }
+
+  if (steps.length !== colors.length - 1) {
+    throw Error(
+      'When colors are provided, there should be n + 1 colors for n steps.'
+    )
+  }
+
+  if (reversed) {
+    colors = Array.from(colors).reverse()
+  }
+
+  return value => {
+    const stepIndex = steps.findIndex(step => value < step)
+
+    // For the final step, stepIndex is -1, so in all cases this expression
+    // works swimmingly.
+    return colors.slice(stepIndex)[0]
+  }
+}
+
+function age(date) {
+  const now = moment()
+  const dec1st = moment([now.year(), 11, 1])
+  if (now.diff(dec1st) < 0) dec1st.add(-1, 'y')
+
+  const daysElapsed = moment(date).diff(moment(dec1st), 'days') + 1
+  const colorByAge = colorScale([0, 5, 10, 20, 25], undefined, false)
+  return colorByAge(daysElapsed)
+}
diff --git a/.github/actions/update-badge/index.js b/.github/actions/update-badge/index.js
new file mode 100644
index 00000000..487199e1
--- /dev/null
+++ b/.github/actions/update-badge/index.js
@@ -0,0 +1,87 @@
+const fs = require('fs')
+const core = require('@actions/core')
+const github = require('@actions/github')
+const endpoint = require('./endpoint')
+
+let octokit
+
+try {
+  const ghToken = core.getInput('ghToken')
+  const inputFile = core.getInput('inputFile')
+  const outputFile = core.getInput('outputFile')
+
+  const content = fs.readFileSync(inputFile, 'utf8')
+  const lines = content.split('\n')
+  core.startGroup('Extract repositories')
+  const repos = extractRepositories(lines)
+  core.info(`count=${repos.length}`)
+  core.endGroup()
+
+  octokit = github.getOctokit(ghToken)
+  core.startGroup('Fetch repositories')
+  Promise.all(repos.map(({ repoStr }) => generateLine(repoStr)))
+    .then((newLines) => {
+      core.endGroup()
+
+      newLines.forEach((line, i) => {
+        if (shouldUpdate(lines[repos[i].index], line)) {
+          lines[repos[i].index] = line
+        }
+      })
+
+      core.startGroup('Writing to file')
+      fs.writeFileSync(outputFile, lines.join('\n'))
+      core.info(`Finished writing to ${outputFile}`)
+      core.endGroup()
+    })
+    .catch(error => {
+      core.setFailed(error.message)
+    })
+} catch (error) {
+  core.setFailed(error.message)
+}
+
+function extractRepositories(lines) {
+  const repos = []
+
+  let collect = false
+  lines.some((line, index) => {
+    if (line === '### Solutions') {
+      collect = true
+    } else if (collect) {
+      const idx1 = line.indexOf('[')
+      const idx2 = line.indexOf(']')
+      if (idx1 >= 0 && idx2 >= 0) {
+        repos.push({
+          index,
+          repoStr: line.slice(idx1 + 1, idx2)
+        })
+      }
+    }
+
+    return false
+  })
+
+  return repos
+}
+
+async function generateLine(repoStr) {
+  const badge = await generateBadge(repoStr)
+  return `* [${repoStr}](https://github.com/${repoStr}) ![Last Commit on GitHub](${badge})`
+}
+
+async function generateBadge(repoStr) {
+  const [owner, repo] = repoStr.split('/')
+  const { label, message, color } = await endpoint(octokit, { owner, repo })
+
+  core.info(`...fetched repo ${repoStr}`)
+
+  return 'https://img.shields.io/badge/' + [label, message, color]
+    .map(s => encodeURIComponent(s.replace(/\-/g, '--')))
+    .join('-')
+}
+
+function shouldUpdate(oldLine, newLine) {
+  const badDateReg = /red\)$/
+  return badDateReg.test(oldLine) || !badDateReg.test(newLine)
+}
diff --git a/.github/actions/update-badge/package.json b/.github/actions/update-badge/package.json
new file mode 100644
index 00000000..c77c2f3a
--- /dev/null
+++ b/.github/actions/update-badge/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "@actions/core": "^1.2.6",
+    "@actions/github": "3.0.0",
+    "axios": "^0.19.2",
+    "moment": "^2.26.0"
+  }
+}
diff --git a/.github/actions/update-badge/yarn.lock b/.github/actions/update-badge/yarn.lock
new file mode 100644
index 00000000..035e2c38
--- /dev/null
+++ b/.github/actions/update-badge/yarn.lock
@@ -0,0 +1,333 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@actions/core@^1.2.6":
+  version "1.2.6"
+  resolved "https://registry.yarnpkg.com/@actions/core/-/core-1.2.6.tgz#a78d49f41a4def18e88ce47c2cac615d5694bf09"
+  integrity sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA==
+
+"@actions/github@3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@actions/github/-/github-3.0.0.tgz#ce1b721a266ad5ac522da0c9c013c999009604bf"
+  integrity sha512-zSYo0Pzh/AZt0DCBjCUhd9lNBECbbWnPqq5L32DZDTuEhjGJM8VSgOpKSol9climaJxhPJQhu+vUZIZuQi4Z1w==
+  dependencies:
+    "@actions/http-client" "^1.0.3"
+    "@octokit/core" "^2.5.1"
+    "@octokit/plugin-paginate-rest" "^2.2.0"
+    "@octokit/plugin-rest-endpoint-methods" "^3.10.0"
+
+"@actions/http-client@^1.0.3":
+  version "1.0.8"
+  resolved "https://registry.yarnpkg.com/@actions/http-client/-/http-client-1.0.8.tgz#8bd76e8eca89dc8bcf619aa128eba85f7a39af45"
+  integrity sha512-G4JjJ6f9Hb3Zvejj+ewLLKLf99ZC+9v+yCxoYf9vSyH+WkzPLB2LuUtRMGNkooMqdugGBFStIKXOuvH1W+EctA==
+  dependencies:
+    tunnel "0.0.6"
+
+"@octokit/auth-token@^2.4.0":
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/@octokit/auth-token/-/auth-token-2.4.2.tgz#10d0ae979b100fa6b72fa0e8e63e27e6d0dbff8a"
+  integrity sha512-jE/lE/IKIz2v1+/P0u4fJqv0kYwXOTujKemJMFr6FeopsxlIK3+wKDCJGnysg81XID5TgZQbIfuJ5J0lnTiuyQ==
+  dependencies:
+    "@octokit/types" "^5.0.0"
+
+"@octokit/core@^2.5.1":
+  version "2.5.4"
+  resolved "https://registry.yarnpkg.com/@octokit/core/-/core-2.5.4.tgz#f7fbf8e4f86c5cc2497a8887ba2561ec8d358054"
+  integrity sha512-HCp8yKQfTITYK+Nd09MHzAlP1v3Ii/oCohv0/TW9rhSLvzb98BOVs2QmVYuloE6a3l6LsfyGIwb6Pc4ycgWlIQ==
+  dependencies:
+    "@octokit/auth-token" "^2.4.0"
+    "@octokit/graphql" "^4.3.1"
+    "@octokit/request" "^5.4.0"
+    "@octokit/types" "^5.0.0"
+    before-after-hook "^2.1.0"
+    universal-user-agent "^5.0.0"
+
+"@octokit/endpoint@^6.0.1":
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/@octokit/endpoint/-/endpoint-6.0.3.tgz#dd09b599662d7e1b66374a177ab620d8cdf73487"
+  integrity sha512-Y900+r0gIz+cWp6ytnkibbD95ucEzDSKzlEnaWS52hbCDNcCJYO5mRmWW7HRAnDc7am+N/5Lnd8MppSaTYx1Yg==
+  dependencies:
+    "@octokit/types" "^5.0.0"
+    is-plain-object "^3.0.0"
+    universal-user-agent "^5.0.0"
+
+"@octokit/graphql@^4.3.1":
+  version "4.5.1"
+  resolved "https://registry.yarnpkg.com/@octokit/graphql/-/graphql-4.5.1.tgz#162aed1490320b88ce34775b3f6b8de945529fa9"
+  integrity sha512-qgMsROG9K2KxDs12CO3bySJaYoUu2aic90qpFrv7A8sEBzZ7UFGvdgPKiLw5gOPYEYbS0Xf8Tvf84tJutHPulQ==
+  dependencies:
+    "@octokit/request" "^5.3.0"
+    "@octokit/types" "^5.0.0"
+    universal-user-agent "^5.0.0"
+
+"@octokit/plugin-paginate-rest@^2.2.0":
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/@octokit/plugin-paginate-rest/-/plugin-paginate-rest-2.2.2.tgz#d78f6ff2f188753ff217e51e3415a997cd6abce8"
+  integrity sha512-3OO/SjB5BChRTVRRQcZzpL0ZGcDGEB2dBzNhfqVqqMs6WDwo7cYW8cDwxqW8+VvA78mDK/abXgR/UrYg4HqrQg==
+  dependencies:
+    "@octokit/types" "^5.0.0"
+
+"@octokit/plugin-rest-endpoint-methods@^3.10.0":
+  version "3.17.0"
+  resolved "https://registry.yarnpkg.com/@octokit/plugin-rest-endpoint-methods/-/plugin-rest-endpoint-methods-3.17.0.tgz#d8ba04eb883849dd98666c55bf49d8c9fe7be055"
+  integrity sha512-NFV3vq7GgoO2TrkyBRUOwflkfTYkFKS0tLAPym7RNpkwLCttqShaEGjthOsPEEL+7LFcYv3mU24+F2yVd3npmg==
+  dependencies:
+    "@octokit/types" "^4.1.6"
+    deprecation "^2.3.1"
+
+"@octokit/request-error@^2.0.0":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@octokit/request-error/-/request-error-2.0.1.tgz#49bd71e811daffd5bdd06ef514ca47b5039682d1"
+  integrity sha512-5lqBDJ9/TOehK82VvomQ6zFiZjPeSom8fLkFVLuYL3sKiIb5RB8iN/lenLkY7oBmyQcGP7FBMGiIZTO8jufaRQ==
+  dependencies:
+    "@octokit/types" "^4.0.1"
+    deprecation "^2.0.0"
+    once "^1.4.0"
+
+"@octokit/request@^5.3.0", "@octokit/request@^5.4.0":
+  version "5.4.5"
+  resolved "https://registry.yarnpkg.com/@octokit/request/-/request-5.4.5.tgz#8df65bd812047521f7e9db6ff118c06ba84ac10b"
+  integrity sha512-atAs5GAGbZedvJXXdjtKljin+e2SltEs48B3naJjqWupYl2IUBbB/CJisyjbNHcKpHzb3E+OYEZ46G8eakXgQg==
+  dependencies:
+    "@octokit/endpoint" "^6.0.1"
+    "@octokit/request-error" "^2.0.0"
+    "@octokit/types" "^5.0.0"
+    deprecation "^2.0.0"
+    is-plain-object "^3.0.0"
+    node-fetch "^2.3.0"
+    once "^1.4.0"
+    universal-user-agent "^5.0.0"
+
+"@octokit/types@^4.0.1", "@octokit/types@^4.1.6":
+  version "4.1.10"
+  resolved "https://registry.yarnpkg.com/@octokit/types/-/types-4.1.10.tgz#e4029c11e2cc1335051775bc1600e7e740e4aca4"
+  integrity sha512-/wbFy1cUIE5eICcg0wTKGXMlKSbaAxEr00qaBXzscLXpqhcwgXeS6P8O0pkysBhRfyjkKjJaYrvR1ExMO5eOXQ==
+  dependencies:
+    "@types/node" ">= 8"
+
+"@octokit/types@^5.0.0":
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/@octokit/types/-/types-5.0.1.tgz#5459e9a5e9df8565dcc62c17a34491904d71971e"
+  integrity sha512-GorvORVwp244fGKEt3cgt/P+M0MGy4xEDbckw+K5ojEezxyMDgCaYPKVct+/eWQfZXOT7uq0xRpmrl/+hliabA==
+  dependencies:
+    "@types/node" ">= 8"
+
+"@types/node@>= 8":
+  version "14.0.13"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.0.13.tgz#ee1128e881b874c371374c1f72201893616417c9"
+  integrity sha512-rouEWBImiRaSJsVA+ITTFM6ZxibuAlTuNOCyxVbwreu6k6+ujs7DfnU9o+PShFhET78pMBl3eH+AGSI5eOTkPA==
+
+axios@^0.19.2:
+  version "0.19.2"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.19.2.tgz#3ea36c5d8818d0d5f8a8a97a6d36b86cdc00cb27"
+  integrity sha512-fjgm5MvRHLhx+osE2xoekY70AhARk3a6hkN+3Io1jc00jtquGvxYlKlsFUhmUET0V5te6CcZI7lcv2Ym61mjHA==
+  dependencies:
+    follow-redirects "1.5.10"
+
+before-after-hook@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/before-after-hook/-/before-after-hook-2.1.0.tgz#b6c03487f44e24200dd30ca5e6a1979c5d2fb635"
+  integrity sha512-IWIbu7pMqyw3EAJHzzHbWa85b6oud/yfKYg5rqB5hNE8CeMi3nX+2C2sj0HswfblST86hpVEOAb9x34NZd6P7A==
+
+cross-spawn@^6.0.0:
+  version "6.0.5"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
+  integrity sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==
+  dependencies:
+    nice-try "^1.0.4"
+    path-key "^2.0.1"
+    semver "^5.5.0"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
+debug@=3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
+  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
+  dependencies:
+    ms "2.0.0"
+
+deprecation@^2.0.0, deprecation@^2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/deprecation/-/deprecation-2.3.1.tgz#6368cbdb40abf3373b525ac87e4a260c3a700919"
+  integrity sha512-xmHIy4F3scKVwMsQ4WnVaS8bHOx0DmVwRywosKhaILI0ywMDWPtBSku2HNxRvF7jtwDRsoEwYQSfbxj8b7RlJQ==
+
+end-of-stream@^1.1.0:
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.4.tgz#5ae64a5f45057baf3626ec14da0ca5e4b2431eb0"
+  integrity sha512-+uw1inIHVPQoaVuHzRyXd21icM+cnt4CzD5rW+NC1wjOUSTOs+Te7FOv7AhN7vS9x/oIyhLP5PR1H+phQAHu5Q==
+  dependencies:
+    once "^1.4.0"
+
+execa@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-1.0.0.tgz#c6236a5bb4df6d6f15e88e7f017798216749ddd8"
+  integrity sha512-adbxcyWV46qiHyvSp50TKt05tB4tK3HcmF7/nxfAdhnox83seTDbwnaqKO4sXRy7roHAIFqJP/Rw/AuEbX61LA==
+  dependencies:
+    cross-spawn "^6.0.0"
+    get-stream "^4.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
+follow-redirects@1.5.10:
+  version "1.5.10"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
+  integrity sha512-0V5l4Cizzvqt5D44aTXbFZz+FtyXV1vrDN6qrelxtfYQKW0KO0W2T/hkE8xvGa/540LkZlkaUjO4ailYTFtHVQ==
+  dependencies:
+    debug "=3.1.0"
+
+get-stream@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-4.1.0.tgz#c1b255575f3dc21d59bfc79cd3d2b46b1c3a54b5"
+  integrity sha512-GMat4EJ5161kIy2HevLlr4luNjBgvmj413KaQA7jt4V8B4RDsfpHk7WQ9GVqfYyyx8OS/L66Kox+rJRNklLK7w==
+  dependencies:
+    pump "^3.0.0"
+
+is-plain-object@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-3.0.0.tgz#47bfc5da1b5d50d64110806c199359482e75a928"
+  integrity sha512-tZIpofR+P05k8Aocp7UI/2UTa9lTJSebCXpFFoR9aibpokDj/uXBsJ8luUu0tTVYKkMU6URDUuOfJZ7koewXvg==
+  dependencies:
+    isobject "^4.0.0"
+
+is-stream@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
+  integrity sha1-EtSj3U5o4Lec6428hBc66A2RykQ=
+
+isexe@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
+  integrity sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=
+
+isobject@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/isobject/-/isobject-4.0.0.tgz#3f1c9155e73b192022a80819bacd0343711697b0"
+  integrity sha512-S/2fF5wH8SJA/kmwr6HYhK/RI/OkhD84k8ntalo0iJjZikgq1XFvR5M8NPT1x5F7fBwCG3qHfnzeP/Vh/ZxCUA==
+
+macos-release@^2.2.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/macos-release/-/macos-release-2.3.0.tgz#eb1930b036c0800adebccd5f17bc4c12de8bb71f"
+  integrity sha512-OHhSbtcviqMPt7yfw5ef5aghS2jzFVKEFyCJndQt2YpSQ9qRVSEv2axSJI1paVThEu+FFGs584h/1YhxjVqajA==
+
+moment@^2.26.0:
+  version "2.26.0"
+  resolved "https://registry.yarnpkg.com/moment/-/moment-2.26.0.tgz#5e1f82c6bafca6e83e808b30c8705eed0dcbd39a"
+  integrity sha512-oIixUO+OamkUkwjhAVE18rAMfRJNsNe/Stid/gwHSOfHrOtw9EhAY2AHvdKZ/k/MggcYELFCJz/Sn2pL8b8JMw==
+
+ms@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+  integrity sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=
+
+nice-try@^1.0.4:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
+  integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
+
+node-fetch@^2.3.0:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
+  integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
+
+npm-run-path@^2.0.0:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"
+  integrity sha1-NakjLfo11wZ7TLLd8jV7GHFTbF8=
+  dependencies:
+    path-key "^2.0.0"
+
+once@^1.3.1, once@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  integrity sha1-WDsap3WWHUsROsF9nFC6753Xa9E=
+  dependencies:
+    wrappy "1"
+
+os-name@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/os-name/-/os-name-3.1.0.tgz#dec19d966296e1cd62d701a5a66ee1ddeae70801"
+  integrity sha512-h8L+8aNjNcMpo/mAIBPn5PXCM16iyPGjHNWo6U1YO8sJTMHtEtyczI6QJnLoplswm6goopQkqc7OAnjhWcugVg==
+  dependencies:
+    macos-release "^2.2.0"
+    windows-release "^3.1.0"
+
+p-finally@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
+  integrity sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4=
+
+path-key@^2.0.0, path-key@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
+  integrity sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=
+
+pump@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pump/-/pump-3.0.0.tgz#b4a2116815bde2f4e1ea602354e8c75565107a64"
+  integrity sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==
+  dependencies:
+    end-of-stream "^1.1.0"
+    once "^1.3.1"
+
+semver@^5.5.0:
+  version "5.7.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
+  integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
+
+shebang-command@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
+  integrity sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=
+  dependencies:
+    shebang-regex "^1.0.0"
+
+shebang-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
+  integrity sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=
+
+signal-exit@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.3.tgz#a1410c2edd8f077b08b4e253c8eacfcaf057461c"
+  integrity sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA==
+
+strip-eof@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
+  integrity sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=
+
+tunnel@0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/tunnel/-/tunnel-0.0.6.tgz#72f1314b34a5b192db012324df2cc587ca47f92c"
+  integrity sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg==
+
+universal-user-agent@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/universal-user-agent/-/universal-user-agent-5.0.0.tgz#a3182aa758069bf0e79952570ca757de3579c1d9"
+  integrity sha512-B5TPtzZleXyPrUMKCpEHFmVhMN6EhmJYjG5PQna9s7mXeSqGTLap4OpqLl5FCEFUI3UBmllkETwKf/db66Y54Q==
+  dependencies:
+    os-name "^3.1.0"
+
+which@^1.2.9:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
+  integrity sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==
+  dependencies:
+    isexe "^2.0.0"
+
+windows-release@^3.1.0:
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/windows-release/-/windows-release-3.3.1.tgz#cb4e80385f8550f709727287bf71035e209c4ace"
+  integrity sha512-Pngk/RDCaI/DkuHPlGTdIkDiTAnAkyMjoQMZqRsxydNl1qGXNIoZrB7RK8g53F2tEgQBMqQJHQdYZuQEEAu54A==
+  dependencies:
+    execa "^1.0.0"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
+  integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
diff --git a/.github/workflows/update-badge.yml b/.github/workflows/update-badge.yml
new file mode 100644
index 00000000..7edfa177
--- /dev/null
+++ b/.github/workflows/update-badge.yml
@@ -0,0 +1,36 @@
+name: Update AoC badge
+
+on:
+  push:
+  schedule:
+    - cron: '0 0 * 1-11 1'
+    - cron: '0 0 * 12 *'
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ github.ref }}
+          fetch-depth: 0
+
+      - name: Install packages
+        run: yarn
+        working-directory: ./.github/actions/update-badge
+
+      - name: Use local action
+        uses: ./.github/actions/update-badge
+        with:
+          ghToken: ${{ secrets.GITHUB_TOKEN }}
+          inputFile: README.md
+          outputFile: README.md
+
+      - name: Git commit and push
+        run: |
+          git config user.email 'actions@github.com'
+          git config user.name 'github-actions'
+          git add README.md
+          git commit -m 'update badges'
+          git push origin HEAD:${{ github.ref }}
diff --git a/2018.md b/2018.md
index e205d949..15e6869b 100644
--- a/2018.md
+++ b/2018.md
@@ -22,6 +22,7 @@ of Code] event.
     * [Go](#go)
     * [Groovy](#groovy)
     * [Haskell](#haskell)
+    * [Haxe](#haxe)
     * [Idris](#idris)
     * [Java](#java)
     * [JavaScript](#javascript)
@@ -92,6 +93,8 @@ of Code] event.
 * [tomwallace/AdventOfCode2018](https://github.com/tomwallace/AdventOfCode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/tomwallace/AdventOfCode2018.svg)
 * [wimex/AdventOfCode2018](https://github.com/wimex/AdventOfCode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/wimex/AdventOfCode2018.svg)
 * [viceroypenguin/adventofcode](https://github.com/viceroypenguin/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/viceroypenguin/adventofcode.svg)
+* [tstavropoulos/AdventOfCode2018](https://github.com/tstavropoulos/AdventOfCode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/tstavropoulos/AdventOfCode2018.svg)
+* [stevotvr/adventofcode2018](https://github.com/stevotvr/adventofcode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/stevotvr/adventofcode2018.svg)
 
 #### C++
 
@@ -213,6 +216,12 @@ of Code] event.
 * [ephemient/aoc2018](https://github.com/ephemient/aoc2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2018.svg)
 * [tejasbubane/adventofcode-2018](https://github.com/tejasbubane/adventofcode-2018) ![Last commit on Github](https://img.shields.io/github/last-commit/tejasbubane/adventofcode-2018.svg)
 
+#### Haxe
+
+*Solutions to AoC in Haxe.*
+
+* [Gama11/AdventOfCode2018](https://github.com/Gama11/AdventOfCode2018) ![Last commit on Github](https://img.shields.io/github/last-commit/Gama11/AdventOfCode2018.svg)
+
 #### Idris
 
 *Solutions to AoC in Idris.*
@@ -235,6 +244,7 @@ of Code] event.
 * [ars216/Advent-of-Code-2018](https://github.com/ars216/Advent-of-Code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ars216/Advent-of-Code-2018.svg)
 * [jeffrosenberg/advent-of-code-2018](https://github.com/jeffrosenberg/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/jeffrosenberg/advent-of-code-2018.svg)
 * [joethei/Advent-of-Code-2018](https://github.com/joethei/Advent-of-Code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/joethei/Advent-of-Code-2018.svg)
+* [tmrd993/Advent-of-Code-2018](https://github.com/tmrd993/Advent-of-Code-2018)
 
 #### JavaScript
 
@@ -242,6 +252,7 @@ of Code] event.
 
 * [Allypost/advent-of-code-2018](https://github.com/Allypost/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Allypost/advent-of-code-2018.svg)
 * [Covicake/AdventOfCode](https://github.com/Covicake/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Covicake/AdventOfCode.svg)
+* [MaxArt2501/advent-of-code-2018](https://github.com/MaxArt2501/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/MaxArt2501/advent-of-code-2018.svg)
 * [SeanECogan/advent-of-code-2018](https://github.com/SeanECogan/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/SeanECogan/advent-of-code-2018.svg)
 * [TolleyB-J/AdventOfCode2018](https://github.com/TolleyB-J/AdventOfCode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/TolleyB-J/AdventOfCode2018.svg)
 * [adriennetacke/advent-of-code-2018](https://github.com/adriennetacke/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/adriennetacke/advent-of-code-2018.svg)
@@ -263,6 +274,9 @@ of Code] event.
 * [spalberg/AdventOfCode](https://github.com/spalberg/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/spalberg/AdventOfCode.svg)
 * [tommmyy/advent-of-code](https://github.com/tommmyy/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/tommmyy/advent-of-code.svg)
 * [stewartpark/aoc-2018](https://github.com/stewartpark/aoc-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/stewartpark/aoc-2018.svg)
+* [und3f/advent-of-code-2018](https://github.com/und3f/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/und3f/advent-of-code-2018.svg)
+* [branislavjenco/advent2018](https://github.com/branislavjenco/advent2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/branislavjenco/advent2018.svg)
+* [mariotacke/advent-of-code-2018](https://github.com/mariotacke/advent-of-code-2018)
 
 #### Kotlin
 
@@ -309,6 +323,7 @@ of Code] event.
 *Solutions to AoC in Perl.*
 
 * [bewuethr/advent-of-code](https://github.com/bewuethr/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/bewuethr/advent-of-code.svg)
+* [kcaran/adventofcode2018](https://github.com/kcaran/adventofcode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/kcaran/adventofcode2018.svg)
 
 #### Pony
 
@@ -349,6 +364,7 @@ of Code] event.
 * [iBelieve/adventofcode](https://github.com/iBelieve/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/iBelieve/adventofcode.svg)
 * [j0057/aoc2018](https://github.com/j0057/aoc2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/j0057/aoc2018.svg)
 * [oskar404/aoc](https://github.com/oskar404/aoc) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/oskar404/aoc.svg)
+* [mjpieters/adventofcode](https://github.com/mjpieters/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/mjpieters/adventofcode.svg)
 * [racinmat/advent_of_code_2018](https://github.com/racinmat/advent_of_code_2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/racinmat/advent_of_code_2018.svg)
 * [rhbvkleef/aoc-2018](https://github.com/rhbvkleef/aoc-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/rhbvkleef/aoc-2018.svg)
 * [rossengeorgiev/adventofcode-2018](https://github.com/rossengeorgiev/adventofcode-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/rossengeorgiev/adventofcode-2018.svg)
@@ -366,6 +382,7 @@ of Code] event.
 * [ephemient/aoc2018](https://github.com/ephemient/aoc2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2018.svg)
 * [pietroppeter/AdventOfCode2018](https://github.com/pietroppeter/AdventOfCode2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/pietroppeter/AdventOfCode2018.svg)
 * [IFinners/advent-of-code](https://github.com/IFinners/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/IFinners/advent-of-code.svg)
+* [williamfhe/advent-of-code-2018](https://github.com/williamfhe/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/williamfhe/advent-of-code-2018.svg)
 
 #### Racket
 
@@ -405,6 +422,7 @@ of Code] event.
 * [sophiedeziel/advent_of_code_2018](https://github.com/sophiedeziel/advent_of_code_2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/sophiedeziel/advent_of_code_2018.svg)
 * [ste001/advent-of-code-2018](https://github.com/ste001/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ste001/advent-of-code-2018.svg)
 * [taylorthurlow/advent-of-code-2018](https://github.com/taylorthurlow/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/taylorthurlow/advent-of-code-2018.svg)
+* [gjanee/advent-of-code-2018](https://github.com/gjanee/advent-of-code-2018) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/gjanee/advent-of-code-2018.svg)
 
 #### Rust
 
diff --git a/2019.md b/2019.md
new file mode 100644
index 00000000..30fec63c
--- /dev/null
+++ b/2019.md
@@ -0,0 +1,514 @@
+# Awesome Advent of Code
+
+This file contains the archived list of solutions to the 2019 [Advent
+of Code] event.
+
+[Advent of Code]: https://adventofcode.com/
+* [2019](#2019)
+  * [Solutions](#solutions)
+    * [AWK](#awk)
+    * [Ada](#ada)
+    * [Bash](#Bash)
+    * [C](#c)
+    * [C#](#c-1)
+    * [C++](#c-2)
+    * [Clojure](#clojure)
+    * [Common Lisp](#common-lisp)
+    * [Crystal](#crystal)
+    * [D](#d)
+    * [Dart](#dart)
+    * [Elixir](#elixir)
+    * [Elm](#elm)
+    * [Erlang](#erlang)
+    * [F#](#f)
+    * [Go](#go)
+    * [Groovy](#groovy)
+    * [Haskell](#haskell)
+    * [Haxe](#haxe)
+    * [Idris](#idris)
+    * [J](#J)
+    * [Java](#java)
+    * [JavaScript](#javascript)
+    * [Julia](#julia)
+    * [Kotlin](#kotlin)
+    * [LDPL](#ldpl)
+    * [Nim](#nim)
+    * [OCaml](#ocaml)
+    * [PHP](#php)
+    * [Perl](#perl)
+    * [Pony](#pony)
+    * [PowerShell](#powershell)
+    * [Prolog](#prolog)
+    * [Python](#python)
+    * [R](#r)
+    * [Racket](#racket)
+    * [ReasonML](#reasonml)
+    * [Red](#red)
+    * [Ruby](#ruby)
+    * [Rust](#rust)
+    * [Smalltalk](#smalltalk)
+    * [Scala](#scala)
+    * [Scheme](#scheme)
+    * [Swift](#swift)
+    * [TypeScript](#typescript)
+    * [Unison](#unison)
+    * [Zig](#zig)
+  * [Live Streams](#live-streams)
+
+## 2019
+
+**WARNING:** All of these likely contain spoilers.
+
+Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
+
+### Solutions
+
+#### AWK
+
+*Solutions to AoC in AWK.*
+
+#### Ada
+
+*Solutions to AoC in Ada.*
+
+* [jamestomasino/advent-of-code-2019](https://github.com/jamestomasino/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+
+#### Bash
+
+*Solutions to AoC in Bash.*
+
+#### C
+
+*Solutions to AoC in C.*
+
+* [tneish/advent-of-code-2019](https://github.com/tneish/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--05--26-brightgreen)
+
+#### C#
+
+*Solutions to AoC in C#.*
+
+* [AnkurSheel/AdventOfCode2019](https://github.com/AnkurSheel/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [alexchro93/AdventOfCode](https://github.com/alexchro93/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--13-yellowgreen)
+* [eduherminio/AoC2019](https://github.com/eduherminio/AoC2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--05--03-brightgreen)
+* [encse/adventofcode](https://github.com/encse/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--08--26-brightgreen)
+* [sanraith/aoc2019](https://github.com/sanraith/aoc2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--10-brightgreen)
+* [sindrekjr/AdventOfCode](https://github.com/sindrekjr/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--10--24-brightgreen)
+* [tstavropoulos/AdventOfCode2019](https://github.com/tstavropoulos/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--23-green)
+* [viceroypenguin/adventofcode](https://github.com/viceroypenguin/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--20-green)
+
+#### C++
+
+*Solutions to AoC in C++.*
+
+* [TheRealMolen/adventofcode2019](https://github.com/TheRealMolen/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--17-brightgreen)
+* [bwearley/advent-of-code-2019](https://gitlab.com/bwearley/advent-of-code-2019/)
+* [moxenseya/advent-of-code-2019](https://github.com/moxenseya/Advent_Of_Code_2019/)![Last Commit on GitHub](https://img.shields.io/github/last-commit/moxenseya/Advent_Of_Code_2019.svg)
+* [rrrlw/advent-of-code-2019](https://github.com/rrrlw/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--30-brightgreen)
+* [voivoid/advent-of-code](https://github.com/voivoid/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--11-brightgreen)
+
+#### Clojure
+
+*Solutions to AoC in Clojure.*
+
+* [agrison/advent-of-code-2019](https://github.com/agrison/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--09-yellow)
+* [alexparlett/advent-of-code-2019](https://github.com/alexparlett/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--30-brightgreen)
+* [erdos/advent-of-code-2019](https://github.com/erdos/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--26-brightgreen)
+* [fctorial/adventofcode2019-clojure](https://github.com/fctorial/adventofcode2019-clojure) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--05-brightgreen)
+* [fdlk/advent-2019](https://github.com/fdlk/advent-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [felipecortez/advent-of-code](https://github.com/felipecortez/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--24-green)
+* [jdlambert/advent-of-code-2019](https://github.com/jdlambert/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--26-brightgreen)
+* [mastercake10/AdventOfCode2019](https://github.com/mastercake10/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--10-yellowgreen)
+
+#### Common Lisp
+
+*Solutions to AoC in Common Lisp.*
+
+* [HenryS1/adventofcode](https://github.com/HenryS1/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--24-brightgreen)
+
+#### Crystal
+
+*Solutions to AoC in Crystal.*
+
+* [PenguinOwl/advent2019](https://github.com/PenguinOwl/advent2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--17-yellowgreen)
+* [salival1/advent-2019](https://github.com/salival1/advent-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--02-orange)
+
+#### D
+
+*Solutions to AoC in D.*
+
+* [jrfondren/adventofcode](https://github.com/jrfondren/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--01-brightgreen)
+* [m3m0ry/2019-advent](https://github.com/m3m0ry/2019-advent) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--08-brightgreen)
+
+#### Dart
+
+*Solutions to AoC in Dart.*
+
+* [Awjin/advent-of-code](https://github.com/Awjin/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [ejain/advent-of-code-2019](https://github.com/ejain/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--31-brightgreen)
+* [julemand101/AdventOfCode2019](https://github.com/julemand101/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--23-brightgreen)
+
+#### Elixir
+
+*Solutions to AoC in Elixir.*
+
+* [Firebain/adventofcode](https://github.com/Firebain/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--07-yellow)
+* [dunyakirkali/aoc](https://github.com/dunyakirkali/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--09-brightgreen)
+* [es1o/adventofcode](https://github.com/es1o/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--22-green)
+* [jwarwick/aoc_2019](https://github.com/jwarwick/aoc_2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--26-brightgreen)
+* [manniL/aoc-2019-elixir](https://github.com/manniL/aoc-2019-elixir) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [mreishus/aoc](https://github.com/mreishus/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--09--24-brightgreen)
+
+#### Elm
+
+*Solutions to AoC in Elm and Literate Elm.*
+
+#### Erlang
+
+*Solutions to AoC in Erlang.*
+
+* [rhbvkleef/aoc2019](https://github.com/rhbvkleef/aoc2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--07-brightgreen)
+
+#### F#
+
+*Solutions to AoC in F#.*
+
+* [CameronAavik/AdventOfCode](https://github.com/CameronAavik/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [ChrisPritchard/AdventOfCode](https://github.com/ChrisPritchard/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [ThomasGoetzmann/AdventOfCode](https://github.com/ThomasGoetzmann/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--23-brightgreen)
+
+#### Go
+
+*Solutions to AoC in Go.*
+
+* [GreenLightning/aoc19](https://github.com/GreenLightning/aoc19) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--29-brightgreen)
+* [Ullaakut/aoc19](https://github.com/Ullaakut/aoc19) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+* [chigley/advent2019](https://github.com/chigley/advent2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--24-green)
+* [davidaayers/advent-of-code-2019](https://github.com/davidaayers/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--28-brightgreen)
+* [devries/advent_of_code_2019](https://github.com/devries/advent_of_code_2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/devries/advent_of_code_2019.svg)
+* [gliderGeek/adventofcode19](https://github.com/gliderGeek/adventofcode19) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--05-brightgreen)
+* [hamzah-hayat/adventofcode](https://github.com/hamzah-hayat/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--03-brightgreen)
+* [hierynomus/2019-adventofcode.com](https://github.com/hierynomus/code-challenges/tree/master/2019-adventofcode.com) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/hierynomus/code-challenges.svg)
+* [howden/advent19](https://github.com/howden/advent19) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+* [kissgyorgy/adventofcode2019](https://github.com/kissgyorgy/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--14-yellowgreen)
+* [lynerist/Advent-of-code-2019-golang](https://github.com/lynerist/Advent-of-code-2019-golang) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [mreishus/aoc](https://github.com/mreishus/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--09--24-brightgreen)
+* [nlowe/aoc2019]
+* [pancelor/advent-of-code-solutions](https://github.com/pancelor/advent-of-code-solutions) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--22-green)
+* [sasom/adventofcode19](https://gitlab.com/sasom/adventofcode19)
+* [sevaorlov/adventofcode2019](https://github.com/sevaorlov/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--27-brightgreen)
+* [thlacroix/goadvent](https://github.com/thlacroix/goadvent) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--24-green)
+* [williamfhe/advent-of-code-2019](https://github.com/williamfhe/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--22-green)
+* [mightymatth/advent-of-code-2019](https://github.com/mightymatth/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--02-brightgreen)
+* [stevotvr/adventofcode2019](https://github.com/stevotvr/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--29-brightgreen)
+
+#### Groovy
+
+*Solutions to AoC in Groovy.*
+
+#### Haskell
+
+*Solutions to AoC in Haskell.*
+
+* [bzuilhof/AdventOfCode](https://github.com/bzuilhof/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [ephemient/aoc2019#hs](https://github.com/ephemient/aoc2019/tree/hs) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2019/hs.svg)
+* [glguy/advent2019](https://github.com/glguy/advent2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--09--21-brightgreen)
+* [hashedone/advent-of-code-2019-hask](https://github.com/hashedone/advent-of-code-2019-hask) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [nrdmn/adventofcode2019](https://github.com/nrdmn/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [Rick-T/Advent-of-Code-2k19](https://github.com/Rick-T/Advent-of-Code-2k19) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--27-brightgreen)
+* [webbiscuit/adventofcode](https://github.com/webbiscuit/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--05-brightgreen)
+* [sonowz/advent-of-code-haskell](https://github.com/sonowz/advent-of-code-haskell) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--07--18-brightgreen)
+* [alf239/AoC2019](https://github.com/alf239/AoC2019)
+
+#### Haxe
+
+*Solutions to AoC in Haxe.*
+
+* [Gama11/AdventOfCode2019](https://github.com/Gama11/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+
+#### Idris
+
+*Solutions to AoC in Idris.*
+
+#### J
+
+*Solutions to AoC in J.*
+
+* [jitwit/aoc](https://github.com/jitwit/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--07--13-brightgreen)
+
+#### Java
+
+*Solutions to AoC in Java.*
+
+* [SimonBaars/adventOfCode-2019](https://github.com/SimonBaars/adventOfCode-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [SizableShrimp/AdventOfCode2019](https://github.com/SizableShrimp/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--20-green)
+* [agrison/advent-of-code-2019](https://github.com/agrison/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--09-yellow)
+* [giganova/advent-of-code-2019-java](https://github.com/giganova/advent-of-code-2019-java) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--05-yellow)
+* [niedrist/AdventOfCode](https://github.com/niedrist/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--29-brightgreen)
+* [thcathy/advent-of-code](https://github.com/thcathy/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--02--24-brightgreen)
+* [akaritakai/AdventOfCode2019](https://github.com/akaritakai/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--07-brightgreen)
+* [tmrd993/advent-of-code-solutions](https://github.com/tmrd993/advent-of-code-solutions) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--10--08-brightgreen)
+
+#### JavaScript
+
+*Solutions to AoC in JavaScript.*
+
+* [GigaNova/advent-of-code-2019](https://github.com/GigaNova/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [Jedi-Fullstack-Avengers/AdventOfCode](https://github.com/Jedi-Fullstack-Avengers/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--20-green)
+* [MaxArt2501/advent-of-code-2019](https://github.com/MaxArt2501/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--15-yellowgreen)
+* [RaedsLab/advent-of-code](https://github.com/RaedsLab/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--03-orange)
+* [arnauddrain/advent-of-code-2019](https://github.com/arnauddrain/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--13-yellowgreen)
+* [atme/advent-of-code](https://github.com/atme/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--02--02-brightgreen)
+* [bureson/advent-of-code-2019](https://github.com/bureson/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [bwearley/advent-of-code-2019](https://gitlab.com/bwearley/advent-of-code-2019/)
+* [chinesedfan/adventofcode](https://github.com/chinesedfan/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--10--04-brightgreen)
+* [countzero/advent_of_code](https://github.com/countzero/advent_of_code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [danieltrost/adventofcode-2019-solutions-js](https://github.com/danieltrost/adventofcode-2019-solutions-js) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--18-yellowgreen)
+* [davidmargolin/Advent-Of-Code-2019](https://github.com/davidmargolin/Advent-Of-Code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+* [entibo/advent-of-code-golf-2019](https://github.com/entibo/advent-of-code-golf-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--23-green)
+* [gamma032steam/Advent-of-code](https://github.com/gamma032steam/Advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--18-yellowgreen)
+* [gavinhenderson/advent-of-code](https://github.com/gavinhenderson/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [imsalahdev/adventofcode-2019](https://github.com/imsalahdev/adventofcode-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--02--19-brightgreen)
+* [jackcutting/aoc2019](https://github.com/jackcutting/aoc2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+* [mdelerue/AdventOfCode](https://github.com/mdelerue/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--04--03-brightgreen)
+* [und3f/advent-of-code-2019](https://github.com/und3f/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--08-brightgreen)
+* [vguerrerobosch/advent-of-code-2019](https://github.com/vguerrerobosch/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--10-yellowgreen)
+* [vuryss/aoc-2019](https://github.com/vuryss/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--07--04-brightgreen)
+* [mariotacke/advent-of-code-2019](https://github.com/mariotacke/advent-of-code-2019)
+
+#### Julia
+
+*Solutions to AoC in Julia.*
+
+* [goggle/AdventOfCode2019.jl](https://github.com/goggle/AdventOfCode2019.jl) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--18-brightgreen)
+* [gsoleilhac/aoc19.jl](https://github.com/gsoleilhac/aoc19.jl) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--14-yellowgreen)
+* [kamilbeker/aoc2019.jl](https://github.com/kamilbeker/aoc2019.jl) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [racinmat/advent_of_code_2019](https://github.com/racinmat/advent_of_code_2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--23-brightgreen)
+* [Arkoniak/advent_of_code](https://github.com/Arkoniak/advent_of_code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--23-brightgreen)
+
+#### Kotlin
+
+*Solutions to AoC in Kotlin.*
+
+* [0legg/adventofcode](https://github.com/0legg/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--07-brightgreen)
+* [daafith/advent-of-code-2019](https://github.com/daafith/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--02-orange)
+* [ephemient/aoc2019#kt](https://github.com/ephemient/aoc2019/tree/kt) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2019/kt.svg)
+* [hughjdavey/aoc-2019](https://github.com/hughjdavey/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--20-green)
+* [jgoerner/aoc-2019](https://github.com/jgoerner/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--19-yellowgreen)
+* [jorispz/aoc-2019](https://github.com/jorispz/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--17-yellowgreen)
+* [mew/aoc-2019](https://github.com/mew/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [valerakostin/AdventOfCode-2019](https://github.com/valerakostin/AdventOfCode-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--08-brightgreen)
+
+#### LDPL
+
+*Solutions to AoC in LDPL.*
+
+* [Lartu/adventOfCode2019](https://github.com/Lartu/adventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [dgarroDC/advent-of-code-2019-ldpl](https://github.com/dgarroDC/advent-of-code-2019-ldpl) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+
+#### Nim
+
+*Solutions to AoC in Nim.*
+
+* [Coac/advent-of-code-2019](https://github.com/Coac/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [kaushalmodi/aoc2019](https://github.com/kaushalmodi/aoc2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--14-yellowgreen)
+
+#### OCaml
+
+*Solutions to AoC in OCaml.*
+
+* [georgek42/AOC2019](https://github.com/georgek42/AOC2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+
+#### PHP
+
+*Solutions to AoC in PHP.*
+
+* [aran112000/Advent-of-Code-2019-PHP](https://github.com/aran112000/Advent-of-Code-2019-PHP) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--17-yellowgreen)
+* [cbzink/advent-of-code-2019](https://github.com/cbzink/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--03-orange)
+* [vuryss/aoc-2019](https://github.com/vuryss/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--07--04-brightgreen)
+
+#### Perl
+
+*Solutions to AoC in Perl.*
+
+* [DadaIsCrazy/adventofcode2019](https://github.com/DadaIsCrazy/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--03--20-brightgreen)
+* [kcaran/adventofcode2019](https://github.com/kcaran/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--10-brightgreen)
+* [kolcon/adventofcode_2019](https://github.com/kolcon/adventofcode_2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [lskatz/advent-of-code](https://github.com/lskatz/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--13-yellowgreen)
+
+#### Pony
+
+*Solutions to AoC in Pony.*
+
+#### Prolog
+
+*Solutions to AoC in Prolog.*
+
+* [kristianhasselknippe/advent-of-code-2019](https://github.com/kristianhasselknippe/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--21-green)
+
+#### PowerShell
+
+*Solutions to AoC in PowerShell.*
+
+* [Crucerio/adventofcode](https://github.com/Crucerio/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--05-yellow)
+* [martinkonopka/AdventOfCode2019](https://github.com/martinkonopka/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+
+#### Python
+
+*Solutions to AoC in Python.*
+
+* [0x8b/advent-of-code-2019](https://github.com/0x8b/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--12-yellowgreen)
+* [Akumatic/Advent-of-Code](https://github.com/Akumatic/Advent-of-Code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--14-yellowgreen)
+* [Dementophobia/advent-of-code-2019](https://github.com/Dementophobia/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--26-brightgreen)
+* [IFinners/advent-of-code](https://github.com/IFinners/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--13-brightgreen)
+* [JasonCannon/advent-of-code-2019](https://github.com/JasonCannon/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [JesperDramsch/advent-of-code](https://github.com/JesperDramsch/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [Kurocon/AdventOfCode2019](https://github.com/Kurocon/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [Levivig/AdventOfCode2019](https://github.com/Levivig/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--02-orange)
+* [Miccowhy/adventofcode2019](https://github.com/Miccowhy/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--08-brightgreen)
+* [PatMyron/advent-of-code](https://github.com/PatMyron/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--03-orange)
+* [TristoKrempita/advent-of-code](https://github.com/TristoKrempita/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--09-yellow)
+* [a-red-christmas/aoc2019-ae](https://github.com/a-red-christmas/aoc2019-ae) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [agubelu/Advent-of-Code-2019](https://github.com/agubelu/Advent-of-Code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--30-brightgreen)
+* [chase1745/AdventOfCode2019](https://github.com/chase1745/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--05-brightgreen)
+* [dmies/adventOfCode](https://github.com/dmies/adventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [elvinyhlee/advent-of-code-2019-python](https://github.com/elvinyhlee/advent-of-code-2019-python) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--05--26-brightgreen)
+* [ephemient/aoc2019#py](https://github.com/ephemient/aoc2019/tree/py) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2019/py.svg)
+* [gbusch/AdventOfCode](https://github.com/gbusch/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--06-brightgreen)
+* [iownthegame/AdventofCode2019](https://github.com/iownthegame/AdventofCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--22-green)
+* [juffalow/advent-of-code](https://github.com/juffalow/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--02-orange)
+* [kjeliasen/AdventOfCode](https://github.com/kjeliasen/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--29-brightgreen)
+* [kolcon/adventofcode_2019](https://github.com/kolcon/adventofcode_2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [mapio/advent-of-code-2019](https://github.com/mapio/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [mebeim/aoc](https://github.com/mebeim/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--11-brightgreen)
+* [mevdschee/AdventOfCode2019](https://github.com/mevdschee/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--30-brightgreen)
+* [mjpieters/adventofcode](https://github.com/mjpieters/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--02--25-brightgreen)
+* [mpindaro/advent-of-code-2019](https://github.com/mpindaro/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--12-brightgreen)
+* [mreishus/aoc](https://github.com/mreishus/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--09--24-brightgreen)
+* [polhec42/AOC](https://github.com/polhec42/AOC) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--08--10-brightgreen)
+* [r0f1/adventofcode2019](https://github.com/r0f1/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [ste001/advent-of-code-2019](https://github.com/ste001/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+* [vincent-vega/adventofcode](https://github.com/vincent-vega/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--22-brightgreen)
+* [zenieldanaku/AdventOfCode](https://github.com/zenieldanaku/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [branislavjenco/advent2019](https://github.com/branislavjenco/advent2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--10-brightgreen)
+* [loociano/advent-of-code](https://github.com/loociano/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--09-brightgreen)
+
+#### R
+
+*Solutions to AoC in R.*
+
+* [Cattiva/adventofcode](https://github.com/Cattiva/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [EdwinTh/AoC_2019](https://github.com/EdwinTh/AoC_2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--17-yellowgreen)
+* [Morawski21/Advent-of-Code-2019-in-R](https://github.com/Morawski21/Advent-of-Code-2019-in-R) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--04-orange)
+* [adam-gruer/aoc2019](https://github.com/adam-gruer/aoc2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--17-yellowgreen)
+* [akulumbeg/adventofcode](https://github.com/akulumbeg/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--20-brightgreen)
+* [davidmasp/adventofcode-dmp](https://github.com/davidmasp/adventofcode-dmp) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--22-green)
+* [mpjdem/adventofcode2019](https://github.com/mpjdem/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--27-brightgreen)
+* [plannapus/AdventOfCode2019](https://github.com/plannapus/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--08--25-brightgreen)
+* [riinuots/advent2019](https://github.com/riinuots/advent2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--26-brightgreen)
+* [rrrlw/advent-of-code-2019](https://github.com/rrrlw/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--30-brightgreen)
+
+#### Racket
+
+*Solutions to AoC in Racket.*
+
+* [samdphillips/aoc-2019](https://github.com/samdphillips/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--17-yellowgreen)
+
+#### ReasonML
+
+*Solutions to AoC in ReasonML.*
+
+* [believer/advent-of-code](https://github.com/believer/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--10--26-brightgreen)
+
+#### Red
+
+*Solutions to AoC in Red.*
+
+#### Ruby
+
+*Solutions to AoC in Ruby.*
+
+* [Kazhuu/advent-of-code-2019](https://github.com/Kazhuu/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--24-green)
+* [Keirua/adventofcode-rb](https://github.com/Keirua/adventofcode-rb) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--10-yellowgreen)
+* [Pungsnigel/advent_of_code_2019](https://github.com/Pungsnigel/advent_of_code_2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--05-yellow)
+* [gjanee/advent-of-code-2019](https://github.com/gjanee/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--08-brightgreen)
+
+#### Rust
+
+*Solutions to AoC in Rust.*
+
+* [AlexAegis/advent-of-code](https://github.com/AlexAegis/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--21-brightgreen)
+* [AmauryCarrade/AdventOfCode2019](https://github.com/AmauryCarrade/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [AxlLind/AdventOfCode2019](https://github.com/AxlLind/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--04--25-brightgreen)
+* [DarthGandalf/advent-of-code](https://github.com/DarthGandalf/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--19-brightgreen)
+* [alyti/aoc-2019](https://github.com/alyti/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--16-yellowgreen)
+* [bwearley/advent-of-code-2019](https://gitlab.com/bwearley/advent-of-code-2019/)
+* [dashed/advent-of-code](https://github.com/dashed/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--04--06-brightgreen)
+* [fornwall/advent-of-code-2019-rs](https://github.com/fornwall/advent-of-code-2019-rs) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--24-brightgreen)
+* [gr-g/advent-of-code-2019](https://github.com/gr-g/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--02--23-brightgreen)
+* [hashedone/advent-of-code-2019-rust](https://github.com/hashedone/advent-of-code-2019-rust) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--14-yellowgreen)
+* [jdlambert/advent-of-code-2019](https://github.com/jdlambert/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--26-brightgreen)
+* [meyerphi/advent-of-code](https://github.com/meyerphi/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--22-brightgreen)
+* [richardwhiuk/adventofcode](https://github.com/richardwhiuk/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--03--30-brightgreen)
+* [risboo6909/aoc2019-rust](https://github.com/risboo6909/aoc2019-rust) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--23-brightgreen)
+* [RobbieClarken/AdventOfCode2019](https://github.com/RobbieClarken/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--22-brightgreen)
+* [ThePants999/advent-of-code-2019](https://github.com/ThePants999/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--04--03-brightgreen)
+* [thorstel/Advent-of-Code-2019](https://github.com/thorstel/Advent-of-Code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--27-brightgreen)
+* [timvisee/advent-of-code-2019](https://github.com/timvisee/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--20-green)
+* [zsacul/AoC2019](https://github.com/zsacul/AoC2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--30-brightgreen)
+
+#### Smalltalk
+
+*Solutions to AoC in Smalltalk.*
+
+* [thiagoslino/Advent-of-Code-2019](https://github.com/thiagoslino/Advent-of-Code-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--29-brightgreen)
+
+#### Scala
+
+*Solutions to AoC in Scala.*
+
+* [FlorianCassayre/AdventOfCode-2019](https://github.com/FlorianCassayre/AdventOfCode-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--15-yellowgreen)
+* [lupari/aoc](https://github.com/lupari/aoc2019/) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/lupari/aoc2019.svg)
+* [matelaszlo/advent-of-code-scala](https://github.com/matelaszlo/advent-of-code-scala) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--09--28-brightgreen)
+* [sim642/adventofcode](https://github.com/sim642/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--20-brightgreen)
+* [voivoid/scala-adventofcode](https://github.com/voivoid/scala-adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--02--24-brightgreen)
+
+#### Scheme
+
+*Solutions to AoC in Scheme.*
+
+* [jitwit/aoc](https://github.com/jitwit/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--07--13-brightgreen)
+* [nenadom/AdventOfCode](https://github.com/nenadom/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--04-brightgreen)
+
+#### Swift
+
+*Solutions to AoC in Swift.*
+
+* [davedelong/AOC](https://github.com/davedelong/AOC) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--15-brightgreen)
+* [evilmint/AdventOfCode](https://github.com/evilmint/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--08-yellow)
+* [fguchelaar/AdventOfCode2019](https://github.com/fguchelaar/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--06-brightgreen)
+* [gernb/AdventOfCode2019](https://github.com/gernb/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+* [bradleymackey/AdventOfCode2019](https://github.com/bradleymackey/advent-of-code-19)
+
+#### TypeScript
+
+*Solutions to AoC in TypeScript.*
+
+* [AlexAegis/advent-of-code](https://github.com/AlexAegis/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--11--21-brightgreen)
+* [caderek/aoc2019](https://github.com/caderek/aoc2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--03-brightgreen)
+* [florianfreier/AdventOfCode2019](https://github.com/florianfreier/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--10-yellowgreen)
+* [izexi/adventofcode2019](https://github.com/izexi/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--06-yellow)
+* [sw-double/advent-of-code](https://github.com/sw-double/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--01--11-brightgreen)
+
+#### Unison
+
+*Solutions to AoC in Unison.*
+
+* [BenFradet/aoc-2019](https://github.com/BenFradet/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2019--12--25-brightgreen)
+
+#### Zig
+
+*Solutions to AoC in Zig.*
+
+### Live Streams
+
+*Folks who are live streaming their process.*
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7192a3e3..fd3e2942 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,12 +1,14 @@
 # Contributing
 
 To add a new repository to the list, find the appropriate section for
-the repository's language and add a new entry like this:
+the repository's language and add a new entry like this for
+GitHub-hosted repos:
 
-    * (https://github.com/username/repo)
+    * [username/repo]
 
-Save the file and then run `./scripts/add-badges.py` on the command
-line and then commit your changes.
+or like this for non-GH repos:
+
+    * [username/repo](https://somewhere-else.com/username/repo)
 
 Don't link to files or folder within the tree since that messes up the
 badges.  Users will be able to figure out where the code for the
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index f0087684..b8e97f06 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -7,3 +7,4 @@ This file lists the contributors to awesome-advent-of-code.
 | [@chinesedfan](https://github.com/chinesedfan) | Xianming Zhong   |
 | [@dkvasnicka](https://github.com/dkvasnicka)   | Daniel Kvasnička |
 | [@AlexAegis](https://github.com/AlexAegis)     | Sándor Győri     |
+| [@Kazhuu](https://github.com/Kazhuu)           | Mauri Mustonen   |
diff --git a/README.md b/README.md
index a5f4dff9..1754494e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,8 @@ This is a collection of awesome resources related to the yearly
 * [Tools and Utilities](#tools-and-utilities)
 * [Other Advent Calendars](#other-advent-calendars)
 * [2018](/2018.md)
-* [2019](#2019)
+* [2019](/2019.md)
+* [2020](#2020)
   * [Solutions](#solutions)
     * [AWK](#awk)
     * [Ada](#ada)
@@ -31,7 +32,9 @@ This is a collection of awesome resources related to the yearly
     * [Go](#go)
     * [Groovy](#groovy)
     * [Haskell](#haskell)
+    * [Haxe](#haxe)
     * [Idris](#idris)
+    * [J](#J)
     * [Java](#java)
     * [JavaScript](#javascript)
     * [Julia](#julia)
@@ -43,6 +46,7 @@ This is a collection of awesome resources related to the yearly
     * [Perl](#perl)
     * [Pony](#pony)
     * [PowerShell](#powershell)
+    * [Prolog](#prolog)
     * [Python](#python)
     * [R](#r)
     * [Racket](#racket)
@@ -55,6 +59,7 @@ This is a collection of awesome resources related to the yearly
     * [Scheme](#scheme)
     * [Swift](#swift)
     * [TypeScript](#typescript)
+    * [Unison](#unison)
     * [Zig](#zig)
   * [Live Streams](#live-streams)
 
@@ -76,6 +81,9 @@ in your favourite language.*
 * [mhanberg/advent-of-code-clojure-starter](https://github.com/mhanberg/advent-of-code-clojure-starter) *(Clojure)*
 * [caderek/aoc-starter-js](https://github.com/caderek/aoc-starter-js) *(JavaScript)*
 * [caderek/aoc-starter-ts](https://github.com/caderek/aoc-starter-ts) *(TypeScript)*
+* [mariotacke/template-advent-of-code](https://github.com/mariotacke/template-advent-of-code) *(JavaScript)*
+* [arkadye/advent_of_code](https://github.com/arkadye/advent_of_code_framework) *(C++)*
+* [eduherminio/AdventOfCode.Template](https://github.com/eduherminio/AdventOfCode.Template) *(C#)*
 
 ## Tools and Utilities
 
@@ -87,15 +95,16 @@ in your favourite language.*
 * [aocdl](https://github.com/GreenLightning/advent-of-code-downloader) -- Command-line utility that automatically downloads your personal input file while you read the puzzle description *(Go)*.
 * [aoc-cli](https://github.com/keirua/aoc-cli) -- Command-line utility that helps solve problems in ruby: it downloads your personal input file, creates the sample source files and benchmarks your solutions *(Ruby)*.
 * [AoCHelper](https://github.com/eduherminio/AoCHelper) -- NuGet library that simplifies puzzle solving and provides benchmarking *(.NET)*.
+* [aocleaderboard](https://github.com/scarvalhojr/aocleaderboard) -- get over the 200-member limit for private leaderboards and combine multiple leaderboards in a single page with recalculated scores.
 
 ## Other Advent Calendars
 
 *24 days of cool stuff regarding <insert-technology-here>.*
 
-* [Perl6 Advent Calendar](https://perl6advent.wordpress.com/)
+* [Raku Advent Calendar](https://raku-advent.blog/)
 * [QEMU Advent Calendar](https://www.qemu-advent-calendar.org/)
 
-## 2019
+## 2020
 
 **WARNING:** All of these likely contain spoilers.
 
@@ -111,6 +120,8 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 
 *Solutions to AoC in Ada.*
 
+* [jwarwick/aoc_2020](https://github.com/jwarwick/aoc_2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+
 #### Bash
 
 *Solutions to AoC in Bash.*
@@ -119,71 +130,55 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 
 *Solutions to AoC in C.*
 
-* [coder5506/advent-of-code-2019](https://github.com/coder5506/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/coder5506/advent-of-code-2019.svg)
+* [breakthatbass/advent_of_code2020](https://github.com/breakthatbass/advent_of_code2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### C#
 
 *Solutions to AoC in C#.*
 
-* [AnkurSheel/AdventOfCode2019](https://github.com/AnkurSheel/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/AnkurSheel/AdventOfCode2019.svg)
-* [alexchro93/AdventOfCode](https://github.com/alexchro93/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/alexchro93/AdventOfCode.svg)
-* [eduherminio/AoC2019](https://github.com/eduherminio/AoC2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/eduherminio/AoC2019.svg)
-* [encse/adventofcode](https://github.com/encse/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/encse/adventofcode.svg)
-* [sanraith/aoc2019](https://github.com/sanraith/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/sanraith/aoc2019.svg)
-* [sindrekjr/AdventOfCode](https://github.com/sindrekjr/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/sindrekjr/AdventOfCode.svg)
-* [viceroypenguin/adventofcode](https://github.com/viceroypenguin/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/viceroypenguin/adventofcode.svg)
+* [eduherminio/AoC2020](https://github.com/eduherminio/AoC2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### C++
 
 *Solutions to AoC in C++.*
 
-* [voivoid/advent-of-code](https://github.com/voivoid/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/voivoid/advent-of-code.svg)
+* [Sciencentistguy/AdventOfCode](https://github.com/Sciencentistguy/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [Kazhuu/advent-of-code-2020](https://github.com/Kazhuu/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [DarthGandalf/advent-of-code](https://github.com/DarthGandalf/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Clojure
 
 *Solutions to AoC in Clojure.*
 
-* [agrison/advent-of-code-2019](https://github.com/agrison/advent-of-code-2019/) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/agrison/advent-of-code-2019.svg)
-* [alexparlett/advent-of-code-2019](https://github.com/alexparlett/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/alexparlett/advent-of-code-2019.svg)
-* [fctorial/adventofcode2019-clojure](https://github.com/fctorial/adventofcode2019-clojure) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/fctorial/adventofcode2019-clojure.svg)
-* [fdlk/advent-2019](https://github.com/fdlk/advent-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/fdlk/advent-2019.svg)
-* [felipecortez/advent-of-code](https://github.com/felipecortez/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/felipecortez/advent-of-code.svg)
+* [rjray/advent-2020-clojure](https://github.com/rjray/advent-2020-clojure) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [callum-oakley/advent-of-code-2020](https://github.com/callum-oakley/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Common Lisp
 
 *Solutions to AoC in Common Lisp.*
 
-* [topikettunen/advent-of-code-2019](https://github.com/topikettunen/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/topikettunen/advent-of-code-2019.svg)
+* [atgreen/advent-of-code-2020](https://github.com/atgreen/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [m3m0ry/2020-aoc](https://github.com/m3m0ry/2020-aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [~zge/aoc20](https://git.sr.ht/~zge/aoc20)
 
 #### Crystal
 
 *Solutions to AoC in Crystal.*
 
-* [PenguinOwl/advent2019](https://github.com/PenguinOwl/advent2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/PenguinOwl/advent2019.svg)
-* [salival1/advent-2019](https://github.com/salival1/advent-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/salival1/advent-2019.svg)
-
 #### D
 
 *Solutions to AoC in D.*
 
-* [jrfondren/adventofcode](https://github.com/jrfondren/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/jrfondren/adventofcode.svg)
-
 #### Dart
 
 *Solutions to AoC in Dart.*
 
-* [julemand101/AdventOfCode2019](https://github.com/julemand101/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/julemand101/AdventOfCode2019.svg)
+* [julemand101/AdventOfCode2020](https://github.com/julemand101/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Elixir
 
 *Solutions to AoC in Elixir.*
 
-* [Firebain/adventofcode](https://github.com/Firebain/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Firebain/adventofcode.svg)
-* [dunyakirkali/aoc](https://github.com/dunyakirkali/aoc) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/dunyakirkali/aoc.svg)
-* [es1o/adventofcode](https://github.com/es1o/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/es1o/adventofcode.svg)
-* [jwarwick/aoc_2019](https://github.com/jwarwick/aoc_2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/jwarwick/aoc_2019.svg)
-* [manniL/aoc-2019-elixir](https://github.com/manniL/aoc-2019-elixir) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/manniL/aoc-2019-elixir.svg)
-
 #### Elm
 
 *Solutions to AoC in Elm and Literate Elm.*
@@ -192,28 +187,19 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 
 *Solutions to AoC in Erlang.*
 
-* [rhbvkleef/aoc2019](https://github.com/rhbvkleef/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/rhbvkleef/aoc2019.svg)
-
 #### F#
 
 *Solutions to AoC in F#.*
 
-* [CameronAavik/AdventOfCode](https://github.com/CameronAavik/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/CameronAavik/AdventOfCode.svg)
-* [ChrisPritchard/AdventOfCode](https://github.com/ChrisPritchard/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ChrisPritchard/AdventOfCode.svg)
+* [wimex/AdventOfCode2020](https://github.com/wimex/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Go
 
 *Solutions to AoC in Go.*
 
-* [GreenLightning/aoc19](https://github.com/GreenLightning/aoc19) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/GreenLightning/aoc19.svg)
-* [Ullaakut/aoc19](https://github.com/Ullaakut/aoc19) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Ullaakut/aoc19.svg)
-* [chigley/advent2019](https://github.com/chigley/advent2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/chigley/advent2019.svg)
-* [davidaayers/advent-of-code-2019](https://github.com/davidaayers/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/davidaayers/advent-of-code-2019.svg)
-* [devries/advent_of_code_2019](https://github.com/devries/advent_of_code_2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/devries/advent_of_code_2019.svg)
-* [gliderGeek/adventofcode19](https://github.com/gliderGeek/adventofcode19) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/gliderGeek/adventofcode19.svg)
-* [howden/advent19](https://github.com/howden/advent19) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/howden/advent19.svg)
-* [kissgyorgy/adventofcode2019](https://github.com/kissgyorgy/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/kissgyorgy/adventofcode2019.svg)
-* [lynerist/Advent-of-code-2019-golang](https://github.com/lynerist/Advent-of-code-2019-golang) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/lynerist/Advent-of-code-2019-golang.svg)
+* [nlowe/aoc2020](https://github.com/nlowe/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [thlacroix/goadvent](https://github.com/thlacroix/goadvent) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [dds/aoc2020](https://github.com/dds/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Groovy
 
@@ -223,161 +209,134 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 
 *Solutions to AoC in Haskell.*
 
-* [ephemient/aoc2019#hs](https://github.com/ephemient/aoc2019/tree/hs) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2019/hs.svg)
-* [glguy/advent2019](https://github.com/glguy/advent2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/glguy/advent2019.svg)
-* [hashedone/advent-of-code-2019-hask](https://github.com/hashedone/advent-of-code-2019-hask) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/hashedone/advent-of-code-2019-hask.svg)
-* [nrdmn/adventofcode2019](https://github.com/nrdmn/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/nrdmn/adventofcode2019.svg)
-* [webbiscuit/adventofcode](https://github.com/webbiscuit/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/webbiscuit/adventofcode.svg)
-* [bzuilhof/AdventOfCode](https://github.com/bzuilhof/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/bzuilhof/AdventOfCode.svg)
+* [ephemient/aoc2020](https://github.com/ephemient/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [haskelling/aoc2020](https://github.com/haskelling/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [jitwit/aoc](https://github.com/jitwit/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [Sciencentistguy/AdventOfCode](https://github.com/Sciencentistguy/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+
+#### Haxe
+
+*Solutions to AoC in Haxe.*
 
 #### Idris
 
 *Solutions to AoC in Idris.*
 
+* [xWafl/aoc-2020-idris](https://github.com/xWafl/aoc-2020-idris) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+
+#### J
+
+*Solutions to AoC in J.*
+
+* [jitwit/aoc](https://github.com/jitwit/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+
 #### Java
 
 *Solutions to AoC in Java.*
 
-* [SimonBaars/adventOfCode-2019](https://github.com/SimonBaars/adventOfCode-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/SimonBaars/adventOfCode-2019.svg)
-* [agrison/advent-of-code-2019](https://github.com/agrison/advent-of-code-2019/) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/agrison/advent-of-code-2019.svg)
-* [giganova/advent-of-code-2019-java](https://github.com/giganova/advent-of-code-2019-java) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/giganova/advent-of-code-2019-java.svg)
+* [SizableShrimp/AdventOfCode2020](https://github.com/SizableShrimp/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [akaritakai/AdventOfCode2020](https://github.com/akaritakai/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### JavaScript
 
 *Solutions to AoC in JavaScript.*
 
-* [GigaNova/advent-of-code-2019](https://github.com/GigaNova/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/GigaNova/advent-of-code-2019.svg)
-* [Jedi-Fullstack-Avengers/AdventOfCode](https://github.com/Jedi-Fullstack-Avengers/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Jedi-Fullstack-Avengers/AdventOfCode.svg)
-* [RaedsLab/advent-of-code](https://github.com/RaedsLab/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/RaedsLab/advent-of-code.svg)
-* [arnauddrain/advent-of-code-2019](https://github.com/arnauddrain/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/arnauddrain/advent-of-code-2019.svg)
-* [atme/advent-of-code](https://github.com/atme/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/atme/advent-of-code.svg)
-* [bureson/advent-of-code-2019](https://github.com/bureson/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/bureson/advent-of-code-2019.svg)
-* [chinesedfan/adventofcode](https://github.com/chinesedfan/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/chinesedfan/adventofcode.svg)
-* [countzero/advent_of_code](https://github.com/countzero/advent_of_code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/countzero/advent_of_code.svg)
-* [entibo/advent-of-code-golf-2019](https://github.com/entibo/advent-of-code-golf-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/entibo/advent-of-code-golf-2019.svg)
-* [gamma032steam/Advent-of-code](https://github.com/gamma032steam/Advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/gamma032steam/Advent-of-code.svg)
-* [gavinhenderson/advent-of-code](https://github.com/gavinhenderson/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/gavinhenderson/advent-of-code.svg)
-* [imsalahdev/adventofcode-2019](https://github.com/imsalahdev/adventofcode-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/imsalahdev/adventofcode-2019.svg)
-* [jackcutting/aoc2019](https://github.com/jackcutting/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/jackcutting/aoc2019.svg)
-* [mdelerue/AdventOfCode](https://github.com/mdelerue/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/mdelerue/AdventOfCode.svg)
-* [vguerrerobosch/advent-of-code-2019](https://github.com/vguerrerobosch/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/vguerrerobosch/advent-of-code-2019.svg)
-* [vuryss/aoc-2019](https://github.com/vuryss/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/vuryss/aoc-2019.svg)
+* [adriennetacke/advent-of-code-2020](https://github.com/adriennetacke/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [mariotacke/advent-of-code-2020](https://github.com/mariotacke/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [ryanolsonx/aocjs](https://github.com/ryanolsonx/aocjs) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [mdunisch/adventOfCode2020](https://github.com/mdunisch/adventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [AxemaFr/AdventOfCode-2020](https://github.com/AxemaFr/AdventOfCode-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Julia
 
 *Solutions to AoC in Julia.*
 
-* [gsoleilhac/aoc19.jl](https://github.com/gsoleilhac/aoc19.jl) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/gsoleilhac/aoc19.jl.svg)
-* [kamilbeker/aoc2019.jl](https://github.com/kamilbeker/aoc2019.jl) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/kamilbeker/aoc2019.jl.svg)
-* [racinmat/advent_of_code_2019](https://github.com/racinmat/advent_of_code_2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/racinmat/advent_of_code_2019.svg)
+* [racinmat/advent_of_code_2020](https://github.com/racinmat/advent_of_code_2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Kotlin
 
 *Solutions to AoC in Kotlin.*
 
-* [0legg/adventofcode](https://github.com/0legg/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/0legg/adventofcode.svg)
-* [daafith/advent-of-code-2019](https://github.com/daafith/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/daafith/advent-of-code-2019.svg)
-* [ephemient/aoc2019#kt](https://github.com/ephemient/aoc2019/tree/kt) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2019/kt.svg)
-* [hughjdavey/aoc-2019](https://github.com/hughjdavey/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/hughjdavey/aoc-2019.svg)
-* [mew/aoc-2019](https://github.com/mew/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/mew/aoc-2019.svg)
+* [edgars-supe/advent-of-code](https://github.com/edgars-supe/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [ephemient/aoc2020](https://github.com/ephemient/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [janbina/advent-of-code-2020](https://github.com/janbina/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [nschwermann/AdventOfCode](https://github.com/nschwermann/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [yangzii0920/advent-of-code-2020](https://github.com/yangzii0920/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [hughjdavey/advent-of-code-2020](https://github.com/hughjdavey/aoc-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### LDPL
 
 *Solutions to AoC in LDPL.*
 
-* [Lartu/adventOfCode2019](https://github.com/Lartu/adventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Lartu/adventOfCode2019.svg)
-* [dgarroDC/advent-of-code-2019-ldpl](https://github.com/dgarroDC/advent-of-code-2019-ldpl) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/dgarroDC/advent-of-code-2019-ldpl.svg)
-
 #### Nim
 
 *Solutions to AoC in Nim.*
 
+* [pietroppeter/adventofnim](https://github.com/pietroppeter/adventofnim) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+
 #### OCaml
 
 *Solutions to AoC in OCaml.*
 
-* [georgek42/AOC2019](https://github.com/georgek42/AOC2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/georgek42/AOC2019.svg)
-
 #### PHP
 
 *Solutions to AoC in PHP.*
 
-* [aran112000/Advent-of-Code-2019-PHP](https://github.com/aran112000/Advent-of-Code-2019-PHP) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/aran112000/Advent-of-Code-2019-PHP.svg)
-* [cbzink/advent-of-code-2019](https://github.com/cbzink/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/cbzink/advent-of-code-2019.svg)
-* [vuryss/aoc-2019](https://github.com/vuryss/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/vuryss/aoc-2019.svg)
-
 #### Perl
 
 *Solutions to AoC in Perl.*
 
-* [lskatz/advent-of-code](https://github.com/lskatz/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/lskatz/advent-of-code.svg)
-
 #### Pony
 
 *Solutions to AoC in Pony.*
 
+#### Prolog
+
+*Solutions to AoC in Prolog.*
+
 #### PowerShell
 
 *Solutions to AoC in PowerShell.*
 
-* [Crucerio/adventofcode](https://github.com/Crucerio/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Crucerio/adventofcode.svg)
-* [martinkonopka/AdventOfCode2019](https://github.com/martinkonopka/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/martinkonopka/AdventOfCode2019.svg)
+* [sgruber94/awesome-advent-of-code2020](https://github.com/sgruber94/awesome-advent-of-code2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Python
 
 *Solutions to AoC in Python.*
 
-* [0x8b/advent-of-code-2019](https://github.com/0x8b/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/0x8b/advent-of-code-2019.svg)
-* [Akumatic/Advent-of-Code](https://github.com/Akumatic/Advent-of-Code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Akumatic/Advent-of-Code.svg)
-* [BogDAAAMN/advent-of-code](https://github.com/BogDAAAMN/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/BogDAAAMN/advent-of-code.svg)
-* [Dementophobia/advent-of-code-2019](https://github.com/Dementophobia/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Dementophobia/advent-of-code-2019.svg)
-* [IFinners/advent-of-code](https://github.com/IFinners/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/IFinners/advent-of-code.svg)
-* [JasonCannon/advent-of-code-2019](https://github.com/JasonCannon/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/JasonCannon/advent-of-code-2019.svg)
-* [Kurocon/AdventOfCode2019](https://github.com/Kurocon/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Kurocon/AdventOfCode2019.svg)
-* [Levivig/AdventOfCode2019](https://github.com/Levivig/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Levivig/AdventOfCode2019.svg)
-* [Miccowhy/adventofcode2019](https://github.com/Miccowhy/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Miccowhy/adventofcode2019.svg)
-* [PatMyron/advent-of-code](https://github.com/PatMyron/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/PatMyron/advent-of-code.svg)
-* [TristoKrempita/advent-of-code](https://github.com/TristoKrempita/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/TristoKrempita/advent-of-code.svg)
-* [a-red-christmas/aoc2019-ae](https://github.com/a-red-christmas/aoc2019-ae) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/a-red-christmas/aoc2019-ae.svg)
-* [elvinyhlee/advent-of-code-2019-python](https://github.com/elvinyhlee/advent-of-code-2019-python) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/elvinyhlee/advent-of-code-2019-python.svg)
-* [ephemient/aoc2019#py](https://github.com/ephemient/aoc2019/tree/py) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ephemient/aoc2019/py.svg)
-* [gbusch/AdventOfCode](https://github.com/gbusch/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/gbusch/AdventOfCode.svg)
-* [juffalow/advent-of-code](https://github.com/juffalow/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/juffalow/advent-of-code.svg)
-* [mebeim/aoc](https://github.com/mebeim/aoc) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/mebeim/aoc.svg)
-* [metzbernhard/aoc2019](https://github.com/metzbernhard/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/metzbernhard/aoc2019.svg)
-* [mevdschee/AdventOfCode2019](https://github.com/mevdschee/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/mevdschee/AdventOfCode2019.svg)
-* [mpindaro/advent-of-code-2019](https://bitbucket.org/mpindaro/advent-of-code-2019/src/master/)
-* [polhec42/AOC](https://github.com/polhec42/AOC) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/polhec42/AOC.svg)
-* [ste001/advent-of-code-2019](https://github.com/ste001/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/ste001/advent-of-code-2019.svg)
-* [vincent-vega/adventofcode](https://github.com/vincent-vega/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/vincent-vega/adventofcode.svg)
-* [visini/aoc2019](https://github.com/visini/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/visini/aoc2019.svg)
-* [zenieldanaku/AdventOfCode](https://github.com/zenieldanaku/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/zenieldanaku/AdventOfCode.svg)
+* [Akumatic/Advent-of-Code](https://github.com/Akumatic/Advent-of-Code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [IanFindlay/advent-of-code](https://github.com/IanFindlay/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [Kurocon/AdventOfCode2020](https://github.com/Kurocon/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [Levivig/AdventOfCode2020](https://github.com/Levivig/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [Robin-Bakker/advent-of-code](https://github.com/Robin-Bakker/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [eliseomartelli/Advent-of-Code-2020](https://github.com/eliseomartelli/Advent-of-Code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [elvinyhlee/advent-of-code-2020-python](https://github.com/elvinyhlee/advent-of-code-2020-python) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [ephemient/aoc2020](https://github.com/ephemient/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [gamma032steam/Advent-of-code-2020](https://github.com/gamma032steam/Advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [gbusch/AdventOfCode/](https://github.com/gbusch/AdventOfCode/) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [hmludwig/aoc2020](https://github.com/hmludwig/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [matus-pikuliak/advent_2020](https://github.com/matus-pikuliak/advent_2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [mebeim/aoc](https://github.com/mebeim/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [peter-roland-toth/AoC-2020-Python](https://github.com/peter-roland-toth/AoC-2020-Python) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [silverben10/aoc](https://github.com/silverben10/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### R
 
 *Solutions to AoC in R.*
 
-* [Cattiva/adventofcode](https://github.com/Cattiva/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Cattiva/adventofcode.svg)
-* [EdwinTh/AoC_2019](https://github.com/EdwinTh/AoC_2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/EdwinTh/AoC_2019.svg)
-* [Morawski21/Advent-of-Code-2019-in-R](https://github.com/Morawski21/Advent-of-Code-2019-in-R) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Morawski21/Advent-of-Code-2019-in-R.svg)
-* [adam-gruer/aoc2019](https://github.com/adam-gruer/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/adam-gruer/aoc2019.svg)
-* [akulumbeg/adventofcode](https://github.com/akulumbeg/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/akulumbeg/adventofcode.svg)
-* [davidmasp/adventofcode-dmp](https://github.com/davidmasp/adventofcode-dmp) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/davidmasp/adventofcode-dmp.svg)
-* [mpjdem/adventofcode2019](https://github.com/mpjdem/adventofcode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/mpjdem/adventofcode2019.svg)
-* [riinuots/advent2019](https://github.com/riinuots/advent2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/riinuots/advent2019.svg)
+* [nirski/aoc20](https://gitlab.com/nirski/aoc20)
+* [plannapus/Advent_of_Code](https://github.com/plannapus/Advent_of_Code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Racket
 
 *Solutions to AoC in Racket.*
 
-* [samdphillips/aoc-2019](https://github.com/samdphillips/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/samdphillips/aoc-2019.svg)
+* [Bogdanp/aoc2020](https://github.com/Bogdanp/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### ReasonML
 
 *Solutions to AoC in ReasonML.*
 
-* [believer/advent-of-code](https://github.com/believer/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/believer/advent-of-code.svg)
-
 #### Red
 
 *Solutions to AoC in Red.*
@@ -386,58 +345,57 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 
 *Solutions to AoC in Ruby.*
 
-* [Kazhuu/advent-of-code-2019](https://github.com/Kazhuu/advent-of-code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Kazhuu/advent-of-code-2019.svg)
-* [Keirua/adventofcode-rb](https://github.com/Keirua/adventofcode-rb) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Keirua/adventofcode-rb.svg)
-* [Pungsnigel/advent_of_code_2019](https://github.com/Pungsnigel/advent_of_code_2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/Pungsnigel/advent_of_code_2019.svg)
+* [ni3t/advent-2020](https://github.com/ni3t/advent-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Rust
 
 *Solutions to AoC in Rust.*
 
-* [AlexAegis/advent-of-code](https://github.com/AlexAegis/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/AlexAegis/advent-of-code.svg)
-* [AmauryCarrade/AdventOfCode2019](https://github.com/AmauryCarrade/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/AmauryCarrade/AdventOfCode2019.svg)
-* [DarthGandalf/advent-of-code](https://github.com/DarthGandalf/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/DarthGandalf/advent-of-code.svg)
-* [alyti/aoc-2019](https://github.com/alyti/aoc-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/alyti/aoc-2019.svg)
-* [dashed/advent-of-code](https://github.com/dashed/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/dashed/advent-of-code.svg)
-* [fornwall/advent-of-code-2019-rs](https://github.com/fornwall/advent-of-code-2019-rs) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/fornwall/advent-of-code-2019-rs.svg)
-* [hashedone/advent-of-code-2019-rust](https://github.com/hashedone/advent-of-code-2019-rust) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/hashedone/advent-of-code-2019-rust.svg)
-* [meyerphi/advent-of-code](https://github.com/meyerphi/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/meyerphi/advent-of-code.svg)
-* [notviri/aoc2019](https://github.com/notviri/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/notviri/aoc2019.svg)
+* [believer/advent-of-code](https://github.com/believer/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [ephemient/aoc2020](https://github.com/ephemient/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [hashedone/aoc2020](https://github.com/hashedone/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [youngtrashbag/adventofcode](https://github.com/youngtrashbag/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [tejasbubane/adventofcode-2020](https://github.com/tejasbubane/adventofcode-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Smalltalk
 
 *Solutions to AoC in Smalltalk.*
 
-* [thiagoslino/Advent-of-Code-2019](https://github.com/thiagoslino/Advent-of-Code-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/thiagoslino/Advent-of-Code-2019.svg)
-
 #### Scala
 
 *Solutions to AoC in Scala.*
 
-* [FlorianCassayre/AdventOfCode-2019](https://github.com/FlorianCassayre/AdventOfCode-2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/FlorianCassayre/AdventOfCode-2019.svg)
-* [matelaszlo/advent-of-code-scala](https://github.com/matelaszlo/advent-of-code-scala) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/matelaszlo/advent-of-code-scala.svg)
-* [sim642/adventofcode](https://github.com/sim642/adventofcode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/sim642/adventofcode.svg)
+* [niedrist/advent-of-code-2020](https://github.com/niedrist/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [sim642/adventofcode](https://github.com/sim642/adventofcode) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Scheme
 
 *Solutions to AoC in Scheme.*
 
-* [nenadom/AdventOfCode](https://github.com/nenadom/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/nenadom/AdventOfCode.svg)
+* [jitwit/aoc](https://github.com/jitwit/aoc) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### Swift
 
 *Solutions to AoC in Swift.*
 
-* [evilmint/AdventOfCode](https://github.com/evilmint/AdventOfCode) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/evilmint/AdventOfCode.svg)
-* [fguchelaar/AdventOfCode2019](https://github.com/fguchelaar/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/fguchelaar/AdventOfCode2019.svg)
+* [fguchelaar/AdventOfCode2020](https://github.com/fguchelaar/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [gernb/AdventOfCode2020](https://github.com/gernb/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [juanj/AdventOfCode2020](https://github.com/juanj/AdventOfCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [lighthouse16/AdventCode2020](https://github.com/lighthouse16/AdventCode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
 
 #### TypeScript
 
 *Solutions to AoC in TypeScript.*
 
-* [AlexAegis/advent-of-code](https://github.com/AlexAegis/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/AlexAegis/advent-of-code.svg)
-* [caderek/aoc2019](https://github.com/caderek/aoc2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/caderek/aoc2019.svg)
-* [florianfreier/AdventOfCode2019](https://github.com/florianfreier/AdventOfCode2019) ![Last Commit on GitHub](https://img.shields.io/github/last-commit/florianfreier/AdventOfCode2019.svg)
+* [AlexAegis/advent-of-code](https://github.com/AlexAegis/advent-of-code) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [RubenVerg/aoc2020](https://github.com/RubenVerg/aoc2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [adaamz/advent-of-code-2020](https://github.com/adaamz/advent-of-code-2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [milanosie/adventofcode2020](https://github.com/milanosie/adventofcode2020) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+* [GliderGeek/adventofcode20](https://github.com/GliderGeek/adventofcode20) ![Last Commit on GitHub](https://img.shields.io/badge/last%20commit-2020--12--01-orange)
+
+#### Unison
+
+*Solutions to AoC in Unison.*
 
 #### Zig
 
@@ -446,3 +404,24 @@ Read [CONTRIBUTING.md](/CONTRIBUTING.md) to learn how to add your own repos.
 ### Live Streams
 
 *Folks who are live streaming their process.*
+
+* [Alca](https://twitch.tv/Alca) (JavaScript)
+* [ClysmiC](https://twitch.tv/clysmic) (C++)
+* [Pewqazz](https://twitch.tv/Pewqazz) (Python)
+* [Ph3rny](https://twitch.tv/anthonywritescode) (Python)
+* [anagonlive](https://twitch.tv/anagonlive) (Python)
+* [chrisforrence](https://twitch.tv/chrisforrence) (PHP)
+* [dr_njitram](https://twitch.tv/dr_njitram) (Python)
+* [hurlian](https://twitch.tv/hurlian) (Python)
+* [jonathan_paulson](https://www.youtube.com/channel/UCuWLIm0l4sDpEe28t41WITA/videos) (Python)
+* [jwise00](https://www.youtube.com/channel/UCBHySN2FtVPxEJxYU1PXTHA) (Lua)
+* [lizthegrey](https://twitch.tv/lizthegrey) (Go)
+* [lukechampine](https://twitch.tv/nemo1618) (Go/Zig)
+* [martinjaniczek](https://twitch.tv/martinjaniczek) (Elm)
+* [maryjostaebler](https://www.twitch.tv/maryjostaebler) (JavaScript)
+* [nicuveo](https://twitch.tv/nicuveo) (Haskell)
+* [pengiswe](https://www.twitch.tv/pengiswe) (Excel)
+* [psymar_](https://twitch.tv/psymar_) (Python)
+* [spaceboyr00](https://twitch.tv/spaceboyr00) (Python)
+* [theypsilon](https://www.youtube.com/playlist?list=PL959l4g0Ko1riV3QU_qcTgue41y4S7ffP) (Rust)
+* [yernab](https://twitch.tv/yernab) (APL)
diff --git a/scripts/add-badges.py b/scripts/add-badges.py
deleted file mode 100755
index b59c0569..00000000
--- a/scripts/add-badges.py
+++ /dev/null
@@ -1,33 +0,0 @@
-#!/usr/bin/env python3
-import re
-import os
-
-README_PATH = os.path.join(os.path.dirname(__file__), "..", "README.md")
-REPO_RE = re.compile(r"https://github.com/(?P<user>[^/]+?)/(?P<repo>[^/\)]+?)\)")
-
-lines = []
-past_solutions = False
-with open(README_PATH) as f:
-    for line in f:
-        if not past_solutions:
-            if "### Solutions" in line:
-                past_solutions = True
-
-            lines.append(line)
-            continue
-
-        match = REPO_RE.search(line)
-        if match is not None:
-            user = match.groupdict()["user"]
-            repo = match.groupdict()["repo"]
-            lines.append(
-                f"* [{user}/{repo}](https://github.com/{user}/{repo}) "
-                f"![Last Commit on GitHub](https://img.shields.io/github/last-commit/{user}/{repo}.svg)"
-                f"\n"
-            )
-
-        else:
-            lines.append(line)
-
-with open(README_PATH, "w") as f:
-    f.write("".join(lines))