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

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

a,b

This was another implementation exercise, i.e., can you implement this algorithm as specified? So pretty easy. a) took me about 30 minutes or so to code up, b) took like a minute after that since the problem is so similar.

Interestingly, the problem itself is based on a method for finding closed-form general formulae for progressions of integers. You can use it to develop a formula for sums of squares, cubes, quartics etc. or any progression that doesn't seem to have an obvious closed form.

Anyway, there is probably a language where this problem can be solved with a one-liner, I got kinda close, see 9.dart. Check the commits if it's unreadable.