2025-08-22 11:49:18 +0000 UTC

class Solution:
    def findMissingAndRepeatedValues(self, grid: List[List[int]]) -> List[int]:
        n = len(grid)
        freqs = [0] * (n ** 2 + 1)
        res1 = None
        for row in grid:
            for num in row:
                freqs[num] += 1
                if freqs[num] == 2:
                    res1 = num
        return res1, freqs[1:].index(0) + 1