Advent of Code 2024 Solutions

This repo contains my Advent of Code 2024 solutions in Rust. After providing it with your puzzle inputs (or your session token), running the program will print out the answers to all currently solved days of the puzzle. A Docker image is provided to ensure compatibility with machines that do not want to install dependencies.

The goal of this repo is to provide fast, highly tested, and easy-to-use solutions.

This repo may see changes in the future to improve runtime. If you have any suggestions, issues running the code, or find a correctness error: please open an issue or pull request.

Example output:

Day 01 Part 1: 1666427
Day 01 Part 2: 24316233
Day 02 Part 1: 585
Day 02 Part 2: 626
Day 03 Part 1: 165225049
Day 03 Part 2: 108830766
Day 04 Part 1: 2560
Day 04 Part 2: 1910
Day 05 Part 1: 5374
Day 05 Part 2: 4260

Docker Instructions

1. Follow the instructions below for providing your puzzle input.
2. Run docker build -t aoc2024 .
3. Run docker run --rm --name aoc2024-run aoc2024

Providing Your Puzzle Input

There are two supported methods for inputting your puzzle data into this application.

Automatic Puzzle Fetcher (via Session Cookie)

First, get your cookie session data.

You will need to log into the Advent of Code website and then inspect your cookies. If you are using Chrome, you can follow the directions here.

You will be looking for a cookie called session. It will contain a long sequence of hexadecimal digits.

Place that data into a file called cookie.txt in the project directory.

The application will use that data to automatically fetch your puzzle input for each day.

Manual Input

This code will also look in a particular location on your local machine for puzzle input.

In the project directory, it will check a directory called puzzle. Within that directory it will expect Day 1's input to be in a file called 01, Day 2's input to be in a file called 02, etc.

You can find your puzzle input for a given day by logging into the Advent of Code website and then navigating to the URL for that puzzle's input.

The URL for your puzzle input will be at:

https://adventofcode.com/2024/day/${DAY}/input

where ${DAY} is the day number of the puzzle.

As an example, Day 1's input is at https://adventofcode.com/2024/day/1/input, Day 2's input is at https://adventofcode.com/2024/day/2/input, etc.