HackerRank - "Flowers"

#include<iostream>
#include<algorithm>
using namespace std;

int main(void)
{

   int N, K;
   cin >> N >> K;
    int C[N];
   for(int i = 0; i < N; i++){
      cin >> C[i];
   }
   
   sort(C, C + N, greater<int>());
    
   int result;

    int cnt = 0;
    for(int i = 0; i < N; i ++)
        result += C[i] * ((cnt ++) / K + 1);
 
  cout << result << "\n";
   
   return 0;
}