2025-08-22 15:46:45 +0000 UTC

class Solution:
    def modifiedMatrix(self, matrix: List[List[int]]) -> List[List[int]]:
        rows, cols = len(matrix), len(matrix[0])
        for col in range(cols):
            max_val = -1
            for row in range(rows):
                max_val = max(max_val, matrix[row][col])
            for row in range(rows):
                if matrix[row][col] == -1:
                    matrix[row][col] = max_val
        return matrix