func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mxN = 1000000;   int a[mxN];   void solve() {     int n, k;     cin >> n >> k;     int idx = ceil((double)n / 2);     int sub = (n - idx) + 1;     for (int i = 0; i < n * k; i++) {       cin >> a[i];     }     long long ans = 0, cnt = 0;     for (int i = n * k - sub; cnt < k; i -= sub) {       ans += a[i];       cnt++;     }     cout << ans <<   n ;   }   int main(void) {     ios::sync_with_stdio(false);     cin.tie(NULL);     int t;     cin >> t;     while (t--) solve();     return 0;   }   