Advent of Code solutions
Usually in array languages, or something else that is interesting.
I post the best code I can come up with without assistance here, usually.
If you'd like a long form explanation of any solution, add an issue.
Inputs are not given since they are not open source.

2015: J
2016: Mercury
2017: Lil
2020: APL
2021: BQN
2022: Lil, BQN
2023: Maude

Mercury: use mmc --make <insert program name without .m>
Lil: lilt <filename>
Maude: maude -trust <filename>
erew run . *** (might be different for some days)