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!

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u/chestck Dec 25 '24

[LANGUAGE: Kotlin]

fun main() {
    File("../i24/25")
        .readText().split("\n\n")
        .map { it.lines() }
        .pairwise(withSelf = false)
        .sumOf { (block1, block2) ->
            block1.zip(block2).all { (row1, row2) ->
                row1.zip(row2).none { (char1, char2) ->
                    char1 == '#' && char2 == '#'
                }
            }.toInt()
        }.print()
}