给定一个 m x n 的矩阵，如果一个元素为 0 ，则将其所在行和列的所有元素都设为 0 。请使用 原地 算法

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