func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, car[101][101];     bool t[101] = {0};     vector<int> ans;     ans.clear();     scanf( %d , &n);     for (int i = 0; i < n; i++) {       for (int j = 0; j < n; j++) {         scanf( %d , &car[i][j]);         if (car[i][j] == 2) {           t[j] = true;         } else if (car[i][j] == 1) {           t[i] = true;         } else if (car[i][j] == 3) {           t[i] = true;           t[j] = true;         }       }     }     for (int i = 0; i < n; i++) {       if (t[i] == false) ans.push_back(i + 1);     }     printf( %d n , ans.size());     for (int i = 0; i < ans.size(); i++) {       printf( %d , ans[i]);       if (i < ans.size() - 1) printf(   );     }     return 0;   }   