Solving all of this year's AoC challenges in Haskell, once again!

Current progress:

Some cool stuff I learned / did / remembered this year:

• Simple paralellisation in Haskell (see Utils.hs and Main.hs template)
• Regexes in Haskell (see day 3)
• The magic of Data.Map.union(s)With
• Floating point operations in Haskell (see day 14)
• A nice and sufficiently fast implementation of Dijkstra (see day 18)
• Cliques and how to find them kiiinda efficiently (see day 23)
• A little Vector.hs library with some basic operations (see Vector.hs). (I'd ultimately like to also make a Matricx.hs library, and would also like to explore if / how we can bake dimension into the type system for compile-time checking and less repetitive code.)
• That I finally need to make a Graph.hs library that provides basic functionality like DFS, BFS, Dijkstra, etc. To be done :)