Part 2 really shouldn't have taken me so long, but unfortunately I originally misunderstood the explanations. I was laying in bed last night when I got that the red tiles are the ordered points of a polygon! Finally put together a solution using a Python library called Shapely. Might prove handy for a "Programming for science" class I will be teaching next semester!
https://github.com/plbrault/advent-of-code-2025/blob/main/09.py
#AdventOfCode
Pier-Luc Brault
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2025-12-11 00:30:29 UTC
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