Advent of Code 2022

My solutions for Advent of Code 2022, written in Rust.

This repository provides a good template for anyone interested in writing their solutions in Rust. Follow the instructions below to get started!

Setup

Prerequisites

If you don't already have Rust installed, you'll want to install it here. Otherwise, the only things you'll need are a terminal/shell and a text editor (I recommend Helix if you're shopping for a new one).

Clobbering my Solutions (For Your Integrity!)

To get started, you'll want to fork this repository and then delete any of my solutions I've submitted so far to keep yourself from being spoiled:

rm src/day*.rs

Also, in the src/main.rs file, you'll need to delete all mod dayN; declarations and reset the get_day_solution implementation to the following:

fn get_day_solution(day: usize, lines: impl Iterator<Item = String>) -> Box<dyn DaySolution> {
    match day {
        // 1 => Box::new(day1::Day1::from_lines(input)),
        _other => panic!("Day hasn't been solved yet"),
    }
}

Now you're ready to go!. You'll want to log in to Advent of Code so that you can download inputs automatically.

Logging In to Advent of Code

Go to the Advent of Code site and log in at the top of the page. Once you're signed in, you should open the Developer Tools and head to the "Network" tab, and then reload the page. Look through your requests until you find one that has your "session" cookie. Copy the contents of that cookie (the alphanumeric string after the equals sign) sans quotes to a file called .session in this repository. Now you're ready to download inputs from the terminal!

Note: the .session file is .gitignored, so you don't accidentally upload your login token to GitHub.

Setting Up For a Day

The prep-day.sh script in the root of this repository will download your input using curl to a .gitignored .input directory and then copy a boilerplate module to src/dayN.rs, so you can start working (almost) right away! Here's how to run it:

sh prep-day.sh <day>

Just remember to update main.rs with the suggestions printed by the prep-day.sh script to ensure that you can run your solutions.

Running

To run your solutions for a day, run the following in the repo:

cargo run <day>

You should see something like the following:

❯ cargo run 1
    Finished dev [unoptimized + debuginfo] target(s) in 0.00s
     Running `target/debug/aoc-2022 1`
Solving day 1...
Part 1: <solution> (0.000100000 seconds)
Part 2: <solution> (0.000300000 seconds)

Questions

If you have any issues getting this up and running, you can make an issue on GitHub, email me at [email protected] or ping me on Discord at Smores#6844; I'm happy to help anyone that gets stuck. Good luck learning Rust for those of you picking it up, and enjoy the gift of pulling your hair out puzzle solving for the holiday season!