https://leetcode.com/problems/find-missing-and-repeated-values

easy/find_missing_and_repeated_values.py

@@ -0,0 +1,21 @@
+# https://leetcode.com/problems/find-missing-and-repeated-values
+
+from typing import List
+
+class Solution:
+    def findMissingAndRepeatedValues(self, grid: List[List[int]]) -> List[int]:
+        result: List[int] = []
+        counts = {}
+        n = len(grid) ** 2
+        expected_sum = n * (n + 1) // 2
+        actual_sum = 0
+        for row in grid:
+            for val in row:
+                actual_sum += val
+                if val in counts:
+                    result.append(val)
+                else:
+                    counts[val] = 1
+        result.append(result[0] - (actual_sum - expected_sum))
+        return result
+