Advent of Code 2023 in Rust

My [Advent of Code 2023][aoc-2023] solutions in the Rust programming language. This repository holds a separate Rust project for each day and part.

I attempt to develop a standalone, elegant, compact and fast solution for each problem (two each day).

Two years ago I did the same, solving everything in under a second:

https://timvisee.com/blog/solving-aoc-2020-in-under-a-second/
https://github.com/timvisee/advent-of-code-2021
https://github.com/timvisee/advent-of-code-2020

Timings

Here is how long each solution runs with my input. All solutions are measured (non scientifically) in bench.rs on an AMD Ryzen 9 5900X (24) @ 3.7GHz machine running Linux.

| | part A | part B | |:-----------------------------------------------|:------------------------------------|:------------------------------------| | day 1 | 0.016 ms | 0.028 ms | | day 2 | 0.011 ms | 0.016 ms | | day 3 | 0.019 ms | 0.018 ms | | day 4 | 0.017 ms | 0.017 ms | | day 5 | 0.015 ms | 0.034 ms | | day 6 | 0.001 ms | 0.001 ms | | day 7 | 0.065 ms | 0.066 ms | | day 8 | 0.028 ms | 0.122 ms | | day 9 | 0.042 ms | 0.042 ms | | day 10 | 0.048 ms | 0.095 ms | | day 11 | 0.012 ms | 0.008 ms |

| | one-by-one (1 CPU core) | parallel | |:-------------|:-----------------------------------------|:---------------------------------------------| | everything | 0.77 ms | 0.32 ms |

Run solutions

Each Rust project needs a input.txt file to run, holding the puzzle input. Simply create this file with your input and run the project to see the solution appear.

# Switch to day 1a, add input, and run it
cd day01a
nano input.txt
cargo +nightly run --release
or run everything in parallel
cd ../runner
cargo +nightly run --release --bin runner-par
or benchmark every day
cd ../runner
cargo +nightly run --release --bin bench

Some solutions require Rust Nightly, that's why +nightly is included.

Sadly I cannot include my puzzle input anymore to make each solution easily runnable as per Advent of Code FAQ: