Set Matrix Zeroes

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.

• Time: O(n)
• Space: O(1)

public void setZeroes(int[][] matrix) {
    int m = matrix[0].length, n = matrix.length;
    int[] row = new int[n];
    int[] col = new int[m];
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (matrix[i][j] == 0) {
                row[i] = 1;
                col[j] = 1;
            }
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (row[i] == 1 || col[j] == 1) {
                matrix[i][j] = 0;
            }
        }
    }
}