Advent of Code Solutions

A multi-year collection of Advent of Code solutions implemented in various programming languages.

📊 Overview

Year	Language	Progress
2020	Java	19/25 days
2021	Haskell	14/25 days
2025	Gleam	12/12 days

🚀 Running Solutions

Each year has its own build system and instructions:

2020 (Java)

cd 2020-java
# Compile and run with your preferred Java IDE or:
javac src/me/fetsh/adventofcode2020/day01/Main.java
java -cp src me.fetsh.adventofcode2020.day01.Main

2021 (Haskell)

cd 2021-haskell
stack build
stack test           # Run all tests
stack exec day01     # Run specific day

2025 (Gleam)

cd 2025-gleam
gleam run {day number}          # Run with CLI
gleam test          # Run tests

🔗 Links

• Advent of Code Official Site