my answers in Python 
This project builds with Poetry.
Setup:
curl -sSL https://install.python-poetry.org | python3 -
poetry install
Run the test suite:
poetry run pytest
Run the benchmarks:
poetry run pytest --benchmark-enable
Print solutions for the inputs provided in local data files:
poetry run aoc2021
Lint and code with Black, flake8, and isort:
poetry run black .
poetry run flake8 .
poetry run isort .