aoc2021 VS advent-2021

(Here's my original version that used the uint64 encoding: https://github.com/danvk/aoc2021/blob/e795c78090c35c0b9880fd692ba1677fae31e044/day23/day23.go)

Here's my previous solution, which didn't use any mutation: https://github.com/danvk/aoc2021/blob/92b5352806e0e854ebc36e6c9804dc13b5262349/day18/day18.go

Rust https://github.com/Crazytieguy/advent-2021/blob/master/src/bin/day22/main.rs Imagining the geometry of this was very tricky for me. For a while I contemplated if calculating the intersection of each pair of cuboids would give me enough information to know how many cubes are on at the end, and finally decided that I would also have to calculate the intersections of those and so on, so I gave up. Instead I decided that my state will be a vector of cuboids that are garuanteed to be non overlapping, and on each command I would subtract the current cuboid from each of these non overlapping cuboids (leaving 1 to 6 cuboids depending on intersection), and finally either add in the current cuboid (for on command) or leave it out (for off).