func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 100;   const double PI = 3.14159;   vector<string> v;   long long n, m, k, d, ans[101], c, sum, a[105][105];   set<string> st;   string s, b;   bool flag;   set<string>::iterator it;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(NULL);     cin >> n;     for (int i = 0; i < n; i++) {       for (int j = 0; j < n; j++) {         cin >> a[i][j];       }     }     for (int i = 0; i < n; i++) {       c = 0;       for (int j = 0; j < n; j++) {         if (i == j) continue;         if (a[i][j] == 0 || a[i][j] == 2) c++;       }       if (c == n - 1) {         sum++;         d = i + 1;         ans[d / 32] |= (1 << (d % 32));       }     }     cout << sum << endl;     for (int i = 1; i <= n; i++) {       if (ans[i / 32] & (1 << (i % 32))) cout << i <<    ;     }     return 0;   }   