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  1.  
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. vector<vector<int>> zeroMatrix(vector<vector<int>> &matrix, int n, int m) {
  6.  
  7.     int row[n] = {0}; // row array
  8.     int col[m] = {0}; // col array
  9.  
  10.     // Traverse the matrix:
  11.     for (int i = 0; i < n; i++) {
  12.         for (int j = 0; j < m; j++) {
  13.             if (matrix[i][j] == 0) {
  14.                 // mark ith index of row wih 1:
  15.                 row[i] = 1;
  16.  
  17.                 // mark jth index of col wih 1:
  18.                 col[j] = 1;
  19.             }
  20.         }
  21.     }
  22.  
  23.     // Finally, mark all (i, j) as 0
  24.     // if row[i] or col[j] is marked with 1.
  25.     for (int i = 0; i < n; i++) {
  26.         for (int j = 0; j < m; j++) {
  27.             if (row[i] || col[j]) {
  28.                 matrix[i][j] = 0;
  29.             }
  30.         }
  31.     }
  32.  
  33.     return matrix;
  34. }
  35.  
  36. int main()
  37. {
  38.     vector<vector<int>> matrix = {{1, 1, 1}, {1, 0, 1}, {1, 1, 1}};
  39.     int n = matrix.size();
  40.     int m = matrix[0].size();
  41.     vector<vector<int>> ans = zeroMatrix(matrix, n, m);
  42.  
  43.     cout << "The Final matrix is: n";
  44.     for (auto it : ans) {
  45.         for (auto ele : it) {
  46.             cout << ele << " ";
  47.         }
  48.         cout << "n";
  49.     }
  50.     return 0;
  51. }
  52.  
  53.  
Success #stdin #stdout 0.01s 5280KB
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Standard input is empty
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The Final matrix is: n1 0 1 n0 0 0 n1 0 1 n
https://ideone.com/j6PWwC
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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