#include<bits/stdc++.h>
using namespace std;


class Solution {
public:

void setZeroes(vector<vector<int>> &matrix) {
    int n = matrix.size();
    int m = matrix[0].size();

    vector<int> row(n,0); // row array
    vector<int> col(m,0); // col array

    // Traverse the matrix:
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (matrix[i][j] == 0) {
                // mark ith index of row wih 1:
                row[i] = 1;

                // mark jth index of col wih 1:
                col[j] = 1;
            }
        }
    }

    // Finally, mark all (i, j) as 0
    // if row[i] or col[j] is marked with 1.
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (row[i] || col[j]) {
                matrix[i][j] = 0;
            }
        }
    }

}
};