Add solution for 2025 Day 9

2025-12-09 08:01:49 +01:00
parent a31feacf85
commit 90bbec630e
4 changed files with 160 additions and 18 deletions
@@ -11,7 +11,7 @@ namespace y2021::day04
  bool MarkAndCheck(Array2D<int>& board, int number)
  {
    Index2D index = board.Find(number);
-    if (index)
+    if (index.IsValid())
    {
      board[index] = -1;
      // Check board is filled