func_code_string: #include <bits/stdc++.h>   int main(void) {     int n;     std::cin >> n;     int arr[2 * n];     for (int i = 0; i < 2 * n; i++) std::cin >> arr[i];     int swc = 0;     for (int i = 0; i < 2 * n; i += 2) {       int pos = -1;       for (int j = i + 1; j < 2 * n; j++) {         if (arr[j] == arr[i]) {           pos = j;           break;         }       }       for (int j = pos; j > i + 1; j--) {         swc++;         std::swap(arr[j], arr[j - 1]);       }     }     std::cout << swc <<   n ;     return 0;   }   