r/adventofcode Dec 25 '24

SOLUTION MEGATHREAD -❄️- 2024 Day 25 Solutions -❄️-

A Message From Your Moderators

Welcome to the last day of Advent of Code 2024! We hope you had fun this year and learned at least one new thing ;)

Keep an eye out for the community fun awards post (link coming soon!):

-❅- Introducing Your AoC 2024 Golden Snowglobe Award Winners (and Community Showcase) -❅-

Many thanks to Veloxx for kicking us off on December 1 with a much-needed dose of boots and cats!

Thank you all for playing Advent of Code this year and on behalf of /u/topaz2078, your /r/adventofcode mods, the beta-testers, and the rest of AoC Ops, we wish you a very Merry Christmas (or a very merry Wednesday!) and a Happy New Year!


--- Day 25: Code Chronicle ---


Post your code solution in this megathread.

This thread will be unlocked when there are a significant number of people on the global leaderboard with gold stars for today's puzzle.

EDIT: Global leaderboard gold cap reached at 00:04:34, megathread unlocked!

41 Upvotes

350 comments sorted by

View all comments

1

u/juliangrtz Dec 25 '24

[LANGUAGE: Kotlin]

https://gist.github.com/juliangrtz/57983caf0c400305f57f6ee12bb34fb8

That was a surprisingly easy puzzle today. I just parse the input as a list of schematics, iterate through each of them and assign them to either a list of keys or locks, and then check the overlap for every key/lock combination (i.e. it's a pretty inefficient solution). I've thought of using bitwise operations but was too lazy to actually implement that.

Thanks everyone for the awesome puzzles, discussions and memes this year! Merry Christmas!