advent-of-code-2021 VS public

Some very interesting advent of code contributions written in Rust, available on github, use bitwise operations. Shout out to Tim Visee! https://github.com/timvisee/advent-of-code-2021/blob/master/...

This may be the closest thing I've personally seen: https://github.com/timvisee/advent-of-code-2021

Part 2 0.022ms (22μs)

Part 1 1.05ms

Part 1 0.861ms (861μs)

See https://github.com/timvisee/advent-of-code-2021/blob/master/runner/src/bin/bench.rs

Part 1 0.0027ms (2.7μs)

The orientation calculation could be done by matrix indexes operations https://github.com/FlakM/aoc2021/blob/main/day5/task1/src/main.rs and then its easier to create ranges. You can also use some clever crates and get some calculations for free https://github.com/timvisee/advent-of-code-2021/blob/master/day05b/src/main.rs

I liked the intcode problems not only because they allowed for quasi-interactive problems (which you would not expect to be able to do with a simple input-output type puzzle website) but also more importantly the possibility to reverse engineer the intcode programs. I regard this as "bonus content" since it was not necessary for completing the puzzles but it provided hours of additional fun while doing it. My repo contains the "whitebox" solutions to each intcode problem that bypass the interpreter to extract the solution from the input as directly as possible.