The official awful.systems Advent of Code 2023 thread (awful.systems)

submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]

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Rules: no spoilers.

The other rules are made up as we go along.

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[-] [email protected] 3 points 2 years ago* (last edited 2 years ago)

21 Step Counter

Starting this thread having only solved a.

Pretty straightforward. Could probably be done in a few lines with the right syntactic sugar.

This is some game of life thing that I've never implemented or seen an implementation of, so I am altogether lost.

My current code (https://github.com/Fluxward/aoc2023/blob/main/21.dart) has a memoisation based approach but my current ailments are preventing me from really thinking about this properly so I am bowing out until I have the wherewithal.

[-] [email protected] 2 points 2 years ago

Update on B:

still no solve, however

Through glancing at someone else's code, I was inspired to just try simulating the A problem beyond 64 steps and seeing the result.

Essentially it reaches a (bi stable?) steady state between two numbers, which makes sense- if you can only make single rook steps, then the reachable squares will alternate every cycle.

Don't know if I'll try solve this again tonight but mentally I have now understood the solution.

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this post was submitted on 01 Dec 2023

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