Advent of Code solutions

All years that I've participated in, tested and working in Python 3.10

code: day**.py3 (e.g. day03.py3 - for some days I also have other scripts for testing things)
input: day**_example-input.txt
run with: python3 day**.py3 < day**_example-input.txt or cat day**_example-input.txt | python3 day**.py3
- (or ./day**.py3 < day**_example-input.txt if *.py3 is marked executable)

Per an old tweet from Eric Wastl, creator of the Advent of Code:

In general I ask people not to publish their inputs, just to make it harder for someone to try to steal the whole site.

There are also different versions of the input files for different users, you can sign in at adventofcode.com to download full input files.

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