func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int ar[105] = {0};     int n;     int r;     cin >> n;     int tc = n, a;     while (tc--) {       cin >> r;       for (int i = 0; i < r; i++) {         cin >> a;         ar[a]++;       }     }     for (int i = 1; i <= 100; i++)       if (ar[i] == n) cout << i <<    ;   }   