func_code_string: #include <bits/stdc++.h>   using namespace std;   void solution() {     int n, k;     cin >> n >> k;     vector<long long> v(n * k + 1, 0), brr(n * k + 1, 0);     long long sum = 0;     for (int i = 1; i <= n * k; i++) {       cin >> v[i];       brr[i] = v[i];     }     brr[0] = INT_MAX;     sort(brr.rbegin(), brr.rend());     if (n % 2 == 0) {       int right = n / 2 + 1;       int i = right;       int j = 0;       while (j < k) {         sum = sum + brr[i];         i = i + right;         j++;       }     } else {       int right = n / 2 + n % 2;       int i = right;       int j = 0;       while (j < k) {         sum = sum + brr[i];         i = i + right;         j++;       }     }     cout << sum << endl;   }   int main() {     int t;     cin >> t;     while (t--) {       solution();     }     return 0;   }   