func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     for (int j1 = 0; j1 < t; j1++) {       long long int n;       cin >> n;       long long int arr[n];       long long int sum1 = 0;       long long int sum2 = 0;       for (int j = 0; j < (n / 2); j++) {         arr[j] = ((2 * j) + 2);         sum1 += arr[j];       }       long long int p = 1;       for (int k = n / 2; k < n - 1; k++) {         arr[k] = (2 * p - 1);         p++;         sum2 += (arr[k]);       }       arr[n - 1] = sum1 - sum2;       if (n % 4 == 0) {         cout <<  YES  << endl;         for (int m = 0; m < n; m++) {           cout << arr[m] <<    ;         }         cout << endl;       } else {         cout <<  NO  << endl;       }     }     return 0;   }   