Updated: 2024-02-25
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class Solution:
    def modifiedMatrix(self, matrix: List[List[int]]) -> List[List[int]]:
        m, n = len(matrix), len(matrix[0])
        for j in range(n):
            mx = max(matrix[i][j] for i in range(m))
            for i in range(m):
                if matrix[i][j] == -1:
                    matrix[i][j] = mx
        return matrix
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