func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int x, cnt = 0;     cin >> x;     int arr1[x], arr2[x];     for (int i = 0; i < x; i++) {       cin >> arr1[i] >> arr2[i];     }     for (int i = 0; i < x; i++) {       for (int j = 0; j < x; j++) {         if (i == j) {           continue;         }         if (arr1[i] == arr2[j]) {           cnt++;         }       }     }     cout << cnt;   }   