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Advent of Code 2020 discussion

Advent of Code 2020 starts in 10 hours. Who else is in?

For those unfamiliar

Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other.

You don't need a computer science background to participate - just a little programming knowledge and some problem solving skills will get you pretty far. Nor do you need a fancy computer; every problem has a solution that completes in at most 15 seconds on ten-year-old hardware.
TLDR; 25 coding challenges over the next 25 days. Assuming we have enough code monkeys here on TYM, if there's interest we should definitely start a TYM leaderboard.