advent-of-code/2023
1
0
Fork 0
mirror of https://github.com/parnic/advent-of-code-2023.git synced 2025-06-16 16:50:14 -05:00
Code Issues Packages Projects Releases Wiki Activity

Improve day 14 part 2 runtime

Browse Source 
I realized I was looking for the third occurrence when the second works just as well.
This commit is contained in:
Chris Pickett
2023-12-14 23:05:46 -06:00
parent 91fcf39e17
commit 42e1a27806
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/14.cs
View File

@ -164,10 +164,10 @@ internal class Day14 : Day
Tilt(part2, eastDir);
var result = Stringify(part2);
if (seen.Count(g => g == result) == 2)
if (seen.Any(g => g == result))
{
int periodStart = seen.FindIndex(g => g == result);
int periodLen = seen.Skip(periodStart + 1).ToList().FindIndex(g => g == result) + 1;
int periodLen = seen.Count - periodStart;
loopCycle = ((1000000000L - periodStart) % periodLen) + periodStart;
break;
}