func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       vector<int> arr(4 * n, 0);       for (int i = 0; i < 4 * n; i++) {         cin >> arr[i];       }       sort(arr.begin(), arr.end());       int f = 1, i = 0, j = 4 * n - 1, area = arr[i] * arr[j];       while (i < j) {         if ((arr[i + 1] != arr[i]) || (arr[j - 1] != arr[j]) ||             (arr[i] * arr[j] != area)) {           f = 0;           break;         }         i += 2;         j -= 2;       }       if (f) {         cout <<  YES n ;       } else {         cout <<  NO n ;       }     }   }   