kageru/advent-of-code
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remove unneeded parsing

This commit is contained in:
kageru 2022-12-11 22:51:58 +01:00
parent bd3d070049
commit 09f5b95c78
Signed by: kageru
GPG Key ID: 8282A2BEA4ADA3D2
1 changed files with 10 additions and 7 deletions
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17
2022/src/bin/day11.rs
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@ -17,8 +17,8 @@ struct Monkey {
#[derive(Copy, Clone, Debug)]
enum MonkeyOp {
Add(Option<usize>, Option<usize>),
Mul(Option<usize>, Option<usize>),
Add(Option<usize>),
Mul(Option<usize>),
}
fn parse_input(raw: &str) -> Parsed {
@ -30,9 +30,12 @@ fn parse_input(raw: &str) -> Parsed {
let div_test = parse_num(&test[21..]);
let true_dst = parse_num(&if_true[29..]);
let false_dst = parse_num(&if_false[30..]);
let op = match op[19..].split(' ').collect::<Vec<_>>().as_slice() {
[x, "+", y] => MonkeyOp::Add(x.parse().ok(), y.parse().ok()),
[x, "*", y] => MonkeyOp::Mul(x.parse().ok(), y.parse().ok()),
let op = op.as_bytes();
let op = match (op[23], op[25]) {
(b'+', b'o') => MonkeyOp::Add(None),
(b'+', x) => MonkeyOp::Add(Some((x - b'0') as _)),
(b'*', b'o') => MonkeyOp::Mul(None),
(b'*', x) => MonkeyOp::Mul(Some((x - b'0') as _)),
_ => unreachable!(),
};
Monkey { inspection_count: 0, items, op, div_test, true_dst, false_dst }
@ -61,8 +64,8 @@ fn monkey_business<const ITERATIONS: usize, const STRESS_REDUCTION: usize>(parse
while !monkey.items.is_empty() {
moved.extend(monkey.items.drain(..).map(|mut stress| {
stress = match monkey.op {
MonkeyOp::Add(x, y) => x.unwrap_or(stress) + y.unwrap_or(stress),
MonkeyOp::Mul(x, y) => x.unwrap_or(stress) * y.unwrap_or(stress),
MonkeyOp::Add(x) => stress + x.unwrap_or(stress),
MonkeyOp::Mul(x) => stress * x.unwrap_or(stress),
} / STRESS_REDUCTION;
if stress > lcm {
stress %= lcm;