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completed day 4

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boxfriend
2025-12-04 00:38:21 -05:00
parent b175cf9812
commit 35eb89c494
1 changed files with 20 additions and 7 deletions
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23
AdventOfCode2025/PrintingDepartment.cs
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@@ -16,14 +16,27 @@ public class PrintingDepartment : IAdventSolution
_existingRolls.Add(new Coordinate(j, i));
}
}
var accessible = 0;
foreach (var c in _existingRolls)
var initialCount = _existingRolls.Count;
var accessible = -1;
var firstAccessible = -1;
var toRemove = new HashSet<Coordinate>();
while(accessible != 0 && _existingRolls.Count > 0)
{
if(IsAccessible(c)) accessible++;
accessible = 0;
foreach (var c in _existingRolls)
{
if (!IsAccessible(c)) continue;
accessible++;
toRemove.Add(c);
}
if (firstAccessible == -1) firstAccessible = accessible;
_existingRolls.RemoveWhere(x => toRemove.Contains(x));
toRemove.Clear();
}
return new AdventSolution(accessible.ToString(), null);
return new AdventSolution(firstAccessible.ToString(), (initialCount - _existingRolls.Count).ToString());
}
private readonly Coordinate[] _directions =