Given a 0-indexed m x n integer matrix matrix, create a new 0-indexed matrix called answer. Make answer equal to matrix, then replace each element with the value -1 with the maximum element in its respective column.
Return the matrix answer.
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Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2023/12/24/matrix1.png\")
\n\nInput: matrix = [[1,2,-1],[4,-1,6],[7,8,9]]\nOutput: [[1,2,9],[4,8,6],[7,8,9]]\nExplanation: The diagram above shows the elements that are changed (in blue).\n- We replace the value in the cell [1][1] with the maximum value in the column 1, that is 8.\n- We replace the value in the cell [0][2] with the maximum value in the column 2, that is 9.\n\n\n
Example 2:
\n![\"\"](\"https://assets.leetcode.com/uploads/2023/12/24/matrix2.png\")
\n\nInput: matrix = [[3,-1],[5,2]]\nOutput: [[3,2],[5,2]]\nExplanation: The diagram above shows the elements that are changed (in blue).\n\n\n
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Constraints:
\n\nm == matrix.lengthn == matrix[i].length2 <= m, n <= 50-1 <= matrix[i][j] <= 100Compiled with clang 17 using the latest C++ 20 standard.
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