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optimize more

This commit is contained in:
kageru 2022-12-02 15:07:19 +01:00
parent d865c06f8b
commit 6ced50128c
1 changed files with 7 additions and 7 deletions
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14
2022/src/bin/day02.rs
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@ -8,17 +8,17 @@ fn round([other, _, own, _]: [u8; 4]) -> usize {
(match other.wrapping_sub(own - b'X' + b'A') {
0 => 3 + own - b'W',
1 | 254 => 0 + own - b'W',
2 | 255 => 6 + own - b'W',
_ => unreachable!(),
_ => 6 + own - b'W',
}) as usize
}
fn round_p2([other, _, own, _]: [u8; 4]) -> usize {
(match own {
b'X' => other - b'A' + (3 * (other == b'A') as u8),
b'Y' => other - b'A' + 4,
b'Z' => other - b'A' + 8 - (3 * (other == b'C') as u8),
_ => unreachable!(),
(match (own, other) {
(b'Y', _) => other - b'A' + 4,
(b'X', b'A') => 3,
(b'X', _) => other - b'A',
(_, b'C') => 7,
_ => other - b'A' + 8,
}) as usize
}