From 7e273c40fb92c2860337cf0001b58db5b0efcaa1 Mon Sep 17 00:00:00 2001
From: tiennm99 <tiennm99@outlook.com>
Date: Sat, 29 Nov 2025 00:25:50 +0700
Subject: [PATCH] feat(rs): add hhcn

---
 .gitignore    |  2 ++
 rs/Cargo.lock |  7 +++++++
 rs/Cargo.toml |  8 ++++++++
 rs/hhcn.rs    | 15 +++++++++++++++
 4 files changed, 32 insertions(+)
 create mode 100644 rs/Cargo.lock
 create mode 100644 rs/Cargo.toml
 create mode 100644 rs/hhcn.rs

diff --git a/.gitignore b/.gitignore
index 5b405c6..c66a162 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 .idea
 *.exe
+debug
+target
\ No newline at end of file
diff --git a/rs/Cargo.lock b/rs/Cargo.lock
new file mode 100644
index 0000000..66f1585
--- /dev/null
+++ b/rs/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "claoj"
+version = "0.0.1"
diff --git a/rs/Cargo.toml b/rs/Cargo.toml
new file mode 100644
index 0000000..5cd5b20
--- /dev/null
+++ b/rs/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "claoj"
+version = "0.0.1"
+edition = "2024"
+
+[[bin]]
+name = "hhcn"
+path = "hhcn.rs"
\ No newline at end of file
diff --git a/rs/hhcn.rs b/rs/hhcn.rs
new file mode 100644
index 0000000..19054d3
--- /dev/null
+++ b/rs/hhcn.rs
@@ -0,0 +1,15 @@
+use std::io::{self, BufRead};
+
+fn main() {
+    let mut input = String::new();
+    io::stdin().lock().read_line(&mut input).unwrap();
+
+    let mut nums = input.split_whitespace().map(|x| x.parse::<f64>().unwrap());
+
+    let a = nums.next().unwrap();
+    let b = nums.next().unwrap();
+    let c = nums.next().unwrap();
+
+    let result = 4.0 * (a * b + b * c + c * a) / (a * b * c).sqrt();
+    println!("{}", result);
+}