aoc-2020 VS Advent-of-Code-2020

I've tried it a few times and solutions were surprisingly elegant! E.g., 2020-01-p2.

Figured I'd post my benches as well, see below. Everything done in Rust (link to source).

Here's my day 24 in Rust, using SIMD as usual :) (and offset coordinate encoding to make a SIMD-friendly 2-D cell grid)

Borrowed both ideas in my version :) On my input your version runs at 3ms, mine in 1.5ms, so it might be faster on some inputs (link). I initially started with something similar to yours but then figured why not use 512-bit ints, so that the notion of 'head' and 'tail' disappears as your head then stays at position 0 (so, e.g., to remove a card, you just right-shift the whole bigint). Also used a tiny bit of simd along the way.

Python 929/997

This time we have to fight with crab and fighting with crab is easier. I quickly found the solution to part one and for the part two, I took help from here. So for the second part, credit goes to the author of that code. What was your solution? Please share it on comment.

Python3 my solution. Takes a few seconds for part2.