Advent of Code 2025

I'm really excited for Advent of Code 2025. Specifically the changes which have been made to the format. Fewer puzzles means I'll actually be able to complete it this year instead of losing interest when it becomes too hard to complete a puzzle on a busy evening. No leaderboard means I'll give my variables sensible names instead of stuff like sm, data1, a and my personal favorite, b.

Here are my solutions with a little bit of writing about them. Using cool new subpages!

Day 4 and 5 have both been heads-down with relatively simple solutions, and not a ton to play with. I'm guessing we'll continue the dead-simple write ups for a couple days before we hit the problems which make me want to assume the fetal position.

Half of the days done 🎉
Probably a third of the work done 🙈

I think it's sort of poetic that we never got "Advent of Code 2025 day 25." At least we got all the other ones.

I'll add these as I do them 👏👏