advent-of-code/2023
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day(17): use product of iterators

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Signed-off-by: Matej Focko <me@mfocko.xyz>
This commit is contained in:
Matej Focko 2023-12-17 18:11:53 +01:00
parent 15fccb9f5e
commit 4c07bd4f2e
Signed by: mfocko
GPG key ID: 7C47D46246790496
1 changed files with 9 additions and 7 deletions
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8
src/bin/day17.rs
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@ -1,6 +1,7 @@
use std::collections::HashSet; use std::collections::HashSet;
use aoc_2023::*; use aoc_2023::*;
use itertools::iproduct;
type Output1 = u32; type Output1 = u32;
type Output2 = Output1; type Output2 = Output1;
@ -73,8 +74,10 @@ impl Day17 {
} }
seen.insert((s.position, s.direction)); seen.insert((s.position, s.direction));
for steps in min_steps..=max_steps { for (steps, d) in iproduct!(
for d in [left(&s.direction), right(&s.direction)] { min_steps..=max_steps,
[left(&s.direction), right(&s.direction)]
) {
if !in_range(&self.map, &(s.position + d * steps)) { if !in_range(&self.map, &(s.position + d * steps)) {
continue; continue;
} }
@ -82,7 +85,6 @@ impl Day17 {
queue.push(s.step(&self.map, d, steps)); queue.push(s.step(&self.map, d, steps));
} }
} }
}
unreachable!() unreachable!()
} }