func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MaxN = 100000;   int a[MaxN];   int color[MaxN];   bool f = true;   int n;   int main() {     int n, k;     cin >> n >> k;     for (int i = 1; i <= n; ++i) cin >> a[i];     sort(a + 1, a + n + 1);     reverse(a + 1, a + n + 1);     while (n % k) {       a[n + 1] = a[n];       n++;     }     int ans = 0;     for (int i = 0; i < n / k; ++i) {       ans += (2 * (a[k * i + 1] - 1));     }     cout << ans;   }   