func_code_string: #include <bits/stdc++.h>   using namespace std;   ifstream fin( universal.in );   ofstream fout(  );   int n, m;   set<int> on;   int main() {     cin >> n >> m;     for (int i = 1; i <= n; ++i) {       int aux;       cin >> aux;       for (int j = 1, bb; j <= aux; ++j) {         cin >> bb;         on.insert(bb);       }       if (on.size() == m) {         cout <<  YES n ;         return 0;       }     }     cout <<  NO n ;     return 0;   }   