copy pasting the rules from last year’s thread:

Rules: no spoilers.

The other rules are made up aswe go along.

Share code by link to a forge, home page, pastebin (Eric Wastl has one here) or code section in a comment.

  • @gerikson
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    2 hours ago

    Day 4 - Ceres Search

    discussion

    There’s probably a smarter way to do this…

    For part 1, I dumped everything into a matrix. Then I scanned it element by element. If I found an X, I searched in 8 directions from there and counted up if I found M A S in sequence.

    For part 2 I searched for an A, checked each diagonal corner, and counted up if the opposites were M S or S M

    https://github.com/gustafe/aoc2024/blob/main/d04-Ceres-Search.pl