Solve day eleven
Optimize, minor tweaks
Small edit
rustfmt, day 9 description
Solve day 10
Solve day nine
rustfmt
Reduce allocations, don't actually build tree
Solve day eight
Replace HashMap with FxHashMap
cleanup
rustfmt
Solve day seven
Add day 6 description
Solve day six
cargo fmt
Add day 4 and 5 descriptions
Improvements
Solve day five
Solve day four
Day 4 input