scala3-aoc-2024

Solutions to Advent of Code 2024 challenges implemented in Scala 3.

What is this?

This repository contains my solutions to the Advent of Code 2024 programming puzzles. Advent of Code is an annual event featuring daily programming challenges throughout December. Each day presents a two-part puzzle that can be solved using any programming language.

This implementation focuses on:

• Learning Scala 3 features and idioms
• Building reusable utilities for common puzzle patterns
• Exploring AI-assisted development with GitHub Copilot and Codeium

Quick Start

Prerequisites

• Java 11 or higher
• Mill build tool (downloaded automatically via ./mill)

Running Solutions

# Run all solutions
./mill main.run

# Run tests
./mill main.test

Project Structure

• main/src/aoc2024/ - Daily puzzle solutions (Day01.scala through Day25.scala)
• main/src/util/ - Reusable utility classes for common patterns
• main/resources/inputs/ - Puzzle input files
• main/test/src/ - Test suites with sample data

Implementation Details

For information about the architecture, design decisions, and implementation patterns, see CLAUDE.md.

Contributing

Interested in contributing? Check out the CONTRIBUTING.md file for development workflow and guidelines.

What I Learned

• Scala 3 features: extensions, given/using, indent-based syntax
• Mill build system and Scala tooling (scalafmt, scalafix)
• Graph algorithms with scala-graph
• Linear algebra with breeze
• Geometry algorithms with scala-corner
• AI-assisted development workflows