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sordina | 3 years ago

The binary representation is a neat idea. I found the trickiest part of this problem for me was interpreting an expanding boundary of the considered world: https://github.com/sordina/advent2021/blob/solutions/src/Adv...

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msravi|3 years ago

> the rest of the input image consists of dark pixels (.)

This key bit of information seems to be missing in the originally posted problem, which your link clarifies!