Awesome

2019: https://git.sr.ht/~ttt/aoc2019/tree

2018: https://git.sr.ht/~ttt/aoc18/tree

2017: https://github.com/tumdum/aoc2017

2016: https://bitbucket.org/tumdum/adventofcode2016/src/master/

2015: https://git.sr.ht/~ttt/aoc2015/tree