comment

Author: encse

2025/Day09/Solution.cs

@@ -21,6 +21,10 @@ select Area(r)
  public object PartTwo(string input) {
  var points = Parse(input);
  var segments = Boundary(points).ToArray();
+ // AabbCollision enables rectangles inside or outside the
+ // shape, but the input is set up in a way that big rectangles
+ // are all inside, so this loop will find the correct one for actual
+ // problems.
  return (
  from r in RectanglesOrderedByArea(points)
  where segments.All(s => !AabbCollision(r, s))