Modify the Matrix
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.
Example 1
1 2 -1 4 -1 6 7 8 9
Input
matrix = [[1,2,-1],[4,-1,6],[7,8,9]]Output
[[1,2,9],[4,8,6],[7,8,9]]The value at cell [1][1] is replaced with the maximum value in column 1, which is 8, and the value at cell [0][2] is replaced with the maximum value in column 2, which is 9.
Example 2
3 -1 5 2
Input
matrix = [[3,-1],[5,2]]Output
[[3,2],[5,2]]The value -1 is replaced with the maximum value in its column, which is 2.
Constraints
- m == matrix.length
- n == matrix[i].length
- 2 <= m, n <= 50
- -1 <= matrix[i][j] <= 100
- The input is generated such that each column contains at least one non-negative integer.