(Mostly) Python tests and solutions for the 2015 puzzles. (Day 22 uses Kotlin.)

Other years' solutions:

• 2018 (Kotlin)
• 2017 (Kotlin)
• 2016 (Kotlin)

• Install pyenv and pipenv.
• Run pipenv install --ignore-pipfile.
• Run pipenv shell.

From within the day's folder, run pipenv run python <path/to/source>.py.

From within the 22Kotlin folder, run ./gradlew run.