docs: link earlier Java and Python versions by commit and fix module path

README.md

@@ -1,4 +1,4 @@
-# go-lottery-generator
+# lottery-generator
 
 A lottery number generator written in Go that generates random sequences and tracks when any sequence appears multiple times.
 
@@ -29,6 +29,11 @@ This is a statistical curiosity inspired by [Vietlott](https://vietlott.vn/) Pow
 
 By the birthday paradox, with C(45,6) = 8,145,060 possible combinations, you'd expect a repeat after roughly √(2 × 8,145,060 × ln 2) ≈ **3,360 draws** on average. This program runs the simulation and stops as soon as one sequence has been generated exactly 6 times — letting you observe the actual count empirically.
 
-## Original Python Version
+## Earlier versions
 
-*In 2025, I rewrote this project using Go. The original Python version of this project can be found at [feature/python](https://github.com/tiennm99/lottery-generator/tree/feature/python) branch.*
+This repository keeps the full history of the earlier implementations. The first
+version was written in Java (2023), then rewritten in Python, and in 2025 in Go.
+Browse them at the last commit of each:
+
+- [Java version](https://github.com/tiennm99/lottery-generator/tree/98c8ad5a6b49bda9ec342a95408fb10676640d22)
+- [Python version](https://github.com/tiennm99/lottery-generator/tree/f7432edaf382954e1dacfc4833b3120a64546163)

go.mod

@@ -1,3 +1,3 @@
-module github.com/tiennm99/go-lottery-generator
+module github.com/tiennm99/lottery-generator
 
 go 1.21