func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1000 + 5;   const int mod = 1000 * 1000 * 1000 + 7;   vector<int> p[maxn];   int main() {     ios_base::sync_with_stdio(false);     int n;     cin >> n;     for (int i = 0; i < n; i++) {       int k;       cin >> k;       p[i].resize(k);       for (int j = 0; j < k; j++) cin >> p[i][j];       sort(p[i].begin(), p[i].end());     }     int ans = 0;     for (int i = 0; i < n; i++) {       int pre = i ? i - 1 : n - 1;       int nxt = (i + 1) % n;       int p1 = 0, p2 = 0;       for (int j = 0; j < (int)p[i].size(); j++) {         int cnt = 0;         while (p1 < (int)p[pre].size() && p[pre][p1] < p[i][j]) cnt++, p1++;         while (p2 < (int)p[nxt].size() && p[nxt][p2] < p[i][j]) cnt--, p2++;         if (cnt != 0 && j != 0) ans++;       }     }     cout << ans << endl;     return 0;   }   