func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n, k;     cin >> n >> k;     long long a[n * k];     for (int i = 0; i < n * k; i++) {       cin >> a[i];     }     long long sum = 0;     int jump = ((n + 1) / 2);     if (n % 2 == 0) jump++;     int count = 0;     for (int i = n * k - jump; count < k; i -= jump) {       sum += a[i];       count++;     }     cout << sum << endl;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t;     cin >> t;     while (t--) {       solve();     }     return 0;   }   