Advent of code 2025 in Haskell

Introduction I participated in Advent of Code 2025 in Haskell. It was a fun experience as always! Why write about this now? Because I finished the last puzzle last Saturday! I did all the puzzles each day on time last December except for day 10: part 2 was harder than all the rest combined! Life happened around Christmas, and I took the usual long break away from the puzzles before finishing.…