https://github.com/a11ce/adventofcode2021 (the readme is directed to the students of a class im TAing, we have a racket leaderboard going)

the index solution is neat, i just used a list of lists: https://github.com/a11ce/adventofcode2021/blob/main/day4/day4.rkt i like how we all did the win check in different ways lol

yeah, i love seeing the different solutions

Day 5 was another good one. Simple, yet solutions could range from linear to exponential.

CL - https://github.com/massung/advent2021/blob/main/day5/day5.lisp