func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 102;   int ar[maxn], ans;   int main() {     int n;     cin >> n;     n = 2 * n;     for (int i = 1; i <= n; i++) cin >> ar[i];     for (int i = 1; i <= n; i++)       if (ar[i - 1] != ar[i] && ar[i + 1] != ar[i]) {         int j = i + 1;         while (ar[j] != ar[i] && j <= n) j++;         for (int o = j; o > i + 1; o--) swap(ar[o], ar[o - 1]), ans++;       }     cout << ans << endl;   }   