Gobidev/adventofcode2024
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Speed up day9

Browse Source
This commit is contained in:
Adrian Groh 2024-12-10 19:36:16 +01:00
parent 05b76ae365
commit 0b831d59c9
Signed by: Gobidev
GPG Key ID: 3AA3153E98B0D771
1 changed files with 6 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
day9/src/main.rs
View File

@ -24,20 +24,18 @@ fn checksum(filesystem: &[isize]) -> usize {
} }
fn part1(filesystem: &mut [isize]) -> usize { fn part1(filesystem: &mut [isize]) -> usize {
let mut last = filesystem.len() - 1;
for space_idx in 0..filesystem.len() { for space_idx in 0..filesystem.len() {
if filesystem[space_idx] >= 0 { if filesystem[space_idx] >= 0 {
continue; continue;
} }
let last = filesystem while filesystem[last] < 0 {
.iter() last -= 1;
.enumerate() }
.rev() if last < space_idx {
.find(|(_, n)| n >= &&0)
.unwrap();
if last.0 < space_idx {
break; break;
} }
filesystem.swap(space_idx, last.0); filesystem.swap(space_idx, last);
} }
checksum(filesystem) checksum(filesystem)
} }