func_code_string: #include <bits/stdc++.h>   using namespace std;   using vi = vector<int>;   using vll = vector<long long>;   using vvll = vector<vll>;   using vpii = vector<pair<int, int> >;   using vpll = vector<pair<long long, long long> >;   using vld = vector<long double>;   using vb = vector<bool>;   const int inf = (int)1e9 + 7;   const long long llinf = (long long)1e18 + 7;   void solve() {     long long n;     cin >> n;     vll a[n];     for (long long i = 0; i < n; i++) {       long long ki;       cin >> ki;       for (long long j = 0; j < ki; j++) {         long long x;         cin >> x;         a[i].push_back(x);       }       sort(a[i].begin(), a[i].end());     }     long long ans = 0;     for (long long i = 0; i < n; i++) {       long long l, r;       l = (i - 1 + n) % n;       r = (i + 1 + n) % n;       for (long long j = 1; j <= (a[i].size()) - 1; j++) {         ans += (upper_bound(a[r].begin(), a[r].end(), a[i][j]) -                     upper_bound(a[r].begin(), a[r].end(), a[i][j - 1]) !=                 upper_bound(a[l].begin(), a[l].end(), a[i][j]) -                     upper_bound(a[l].begin(), a[l].end(), a[i][j - 1]));       }     }     cout << ans <<   n ;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int ttt = 1;     while (ttt--) {       solve();     }   }   