neilnjae, 
#AdventOfCode day 11 in #Haskell
A good choice for representation made part 2 trivial (apart from an off-by-one error). Lots of folds to update collections of things.
Full writeup on my blog: https://work.njae.me.uk/2023/12/11/advent-of-code-2023-day-11/
Code on Gitlab: https://gitlab.com/NeilNjae/advent-of-code-23/-/blob/main/advent11/Main.hs
