DecivexUsually I manage to get a more elegant solution on day 1, it is what it is I guess.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day01/src
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day02/src
Could probably be made more efficient but I'm pretty happy with this.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day03/src
I ended up using const generics, allowing me to simply call bank_joltage::<2> and bank_joltage::<12> for part 1 and 2 respectively.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day04/src
I set up a coords library for later days today. (code here) The enumerate_coords function allows me to add coordinates to any iterator of Strings, which can than be collected to something like a map. (Although I ended up just using a HashSet of Coords for today.) I'm probably going to set up some sort of Grid struct or trait at some point but that wasn't necessary for today.
Decided to add some visualization.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day05/src
Finally found a good use of the coalesce function of the itertools crate!
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day06/src
Should start working on some iterator utility methods.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day07/src
I've got a visualization for part two too but that one is too messy to show.
Got an okay looking visualization for part 2!
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day08/src
I haven't started on part 2 yet but I wanted to share this visualization I made for part 1. You can move the camera and everything!
Turns out I barely needed to change anything to solve part 2.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day09/src
Actually did the solving in a different thread for this one, mostly so I could still use itertools.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day10/src
Blech.
At least I learned about a new library, I did some linear algebra by hand and got mostly the correct answer for the first machine so I think using z3 to do the rest is justifiable.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day11/src
It really wasn't all that hard once I stopped getting sidetracked. Prime candidate for a massive code cleanup though.
It'll probably be a lot of work to do what I envisioned for this, idk if I'll stick with it. But here's the shapes from the example input and their variants.
https://gitlab.com/Decivex/advent-of-code-2025/-/tree/master/day12/src
This turned out to be way overcomplicated. (Especially if you know what I now know.)
Pretty though.