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working 15part2, but slower

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This commit is contained in:
foosinn 2020-06-03 23:20:36 +02:00
parent f2ad6c7ad8
commit 84fce2b379
1 changed files with 4 additions and 3 deletions
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7
src/day15/main.rs
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@ -52,6 +52,7 @@ impl Map {
fn walk(&mut self, start: &XY, computer: &intcode::Computer, steps: usize) -> Option<usize> { fn walk(&mut self, start: &XY, computer: &intcode::Computer, steps: usize) -> Option<usize> {
let steps = steps + 1; let steps = steps + 1;
let mut result = None;
for dir in 1..=4 { for dir in 1..=4 {
let direction = Direction::from(dir); let direction = Direction::from(dir);
let xy = start.add((&direction).into()); let xy = start.add((&direction).into());
@ -66,17 +67,17 @@ impl Map {
match status { match status {
Status::HitWall => (), Status::HitWall => (),
Status::MoveComplete => match self.walk(&xy, &computer, steps) { Status::MoveComplete => match self.walk(&xy, &computer, steps) {
Some(i) => return Some(i + 1), Some(i) => result = Some(i + 1),
None => (), None => (),
}, },
Status::Finished => return Some(1), Status::Finished => result = Some(1),
_ => unreachable!("unknown status"), _ => unreachable!("unknown status"),
} }
} else { } else {
unreachable!("computer unexpectedly halted"); unreachable!("computer unexpectedly halted");
} }
} }
None result
} }
fn fill(&mut self) -> usize { fn fill(&mut self) -> usize {