func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, t, ans = 0, i, a, b, m, x, y;     cin >> t;     while (t > 0) {       cin >> n;       vector<int> res;       long long es = 0, os = 0;       if ((n / 2) % 2 == 0) {         cout <<  YES  << endl;         for (i = 0; i < n / 2; i++) {           res.push_back(2 * (i + 1));           es += 2 * (i + 1);         }         for (i = 0; i < n / 2; i++) {           res.push_back(2 * (i + 1) - 1);           os += 2 * (i + 1) - 1;         }         res[n - 1] += es - os;         for (i = 0; i < n; i++) cout << res[i] <<    ;         cout << endl;       } else         cout <<  NO  << endl;       t--;     }   }   