Moved to https://github.com/lydell/advent-of-code/tree/main/2021
Written in Fish (3.3.1).
Run solutions like so:
fish 01a.fish < 01.example.txt
fish 01a.fish < 01.input.txt
Some solutions need external programs, such as rg
(ripgrep), BSD rs
or GNU parallel
.
License: Public domain.