Advent of Code 2021 solutions

A set of 25 puzzle inputs and 50 puzzle solutions, two for each day. Most can be solved in minutes. The puzzles can be found here, although only the first one for each day is visible until you solve it.

Most solutions output at most two lines, the answers to part 1 and 2; but some provide more information in the form of e.g. graphics.

Run a solution by passing the puzzle input to the program:

./one_first.awk <input1

or

./five.py -v <input5

or

cd six
lein run <../input6
lein run 256 <../input6