Solutions for all years; written in Python 3.
All solutions expect the input via stdin. If the input is, for example, in a file called 1,
getting the solution is as simple as one of the following:
python 1.py < 1
pypy3 1.py < 1The solution will be output on stdout on two separate lines, for part 1 and part 2 respectively.
For most days, PyPy is faster than CPython---however, if PyPy does not work (e.g., due to
usage of @cache), CPython is at least as fast as PyPy.