817 B
817 B
Day 14
🎁🎁🎁🎁🎁🎁🎁🎁🎁🎁🎁🎁🎁🎁
Today's language: Rust
Lines of code: 84
Execution time: 0,171 s
This solution uses a single function for the tilting procedure.
Different tilting directions are achieved by "remapping" x and y through captures.
For task 2, a cycle is searched by comparing the rocks after each nwse-tilt with all previous results.
After finding two equal states, only (1.000.000.000 - cycle_start) % cycle_length cycles have to be performed to get the correct result.
This approach requires making copies of the 2D array in a loop, which involves expensive heap allocations.
It is still pretty fast.
rustc day14.rs
./day14