func_code_string: #include <bits/stdc++.h>   using namespace std;   const int OO = (int)1e9;   int dx[8] = {0, 0, -1, 1, 1, 1, -1, -1};   int dy[8] = {1, -1, 0, 0, 1, -1, 1, -1};   long long n, x, y;   bool ok;   map<long long, long long> cnt;   int main() {     cin >> n;     for (int i = 0; i < n; i++) {       cin >> x;       for (int j = 0; j < x; j++) {         cin >> y;         cnt[y]++;       }     }     for (int i = 1; i <= 100; i++) {       if (cnt[i] == n) {         cout << i <<    ;       }     }     return 0;   }   