My personal solutions to the Advent of Code 2021 challenges.
To build the challenge solutions:
make
To clean the build objects:
make clean
To run the challenge (either part 1 or part 2) for a specific day, the format is:
./bin/XX <1|2> < input/XX.txt
E.g. to run day 2, part 1:
./bin/02 1 < input/02.txt