Back for year two! I'm sticking with Rust because it was a lot of fun last time and I don't get a lot of opportunities to write it these days. Maybe TypeScript would be more beneficial as a learning experience but TypeScript is a horrible language that only looks redeemable because it's so vastly improved over regular JavaScript. Aiming for all 25 days again but we'll see how it goes.
This directory is set up as a Cargo workspace. You can test all solutions
against the sample data by running cargo test, and calculate the solutions to
the input in input.txt with cargo run --release.