Problem:
Score : 200 points

Problem Statement

Snuke has N sticks.
The length of the i-th stick is l_i.

Snuke is making a snake toy by joining K of the sticks together.

The length of the toy is represented by the sum of the individual sticks that compose it.
Find the maximum possible length of the toy.

Constraints

1 \leq K \leq N \leq 50

1 \leq l_i \leq 50

l_i is an integer.

Input

Input is given from Standard Input in the following format:

N K
l_1 l_2 l_3 ... l_{N}

Output

Print the answer.

Sample Input 1

5 3
1 2 3 4 5

Sample Output 1

12

You can make a toy of length 12 by joining the sticks of lengths 3, 4 and 5, which is the maximum possible length.

Sample Input 2

15 14
50 26 27 21 41 7 42 35 7 5 5 36 39 1 45

Sample Output 2

386

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
int main(void){
  int n,k,l[50],i,j,tmp,sum=0;
  //入力
  scanf("%d %d",&n,&k);
  for(i=0;i<n;i++){
    scanf("%d",&l[i]);
  }
  //処理 配列lを降順にソートして上澄みのK個を足し合わせるだけ
  for(i=0;i<n;i++){
    for(j=i+1;j<n;j++){
      if(l[i]<l[j]){
        tmp=l[i];
        l[i]=l[j];
        l[j]=tmp;
      }
    }
  }
  for(i=0;i<k;i++)sum+=l[i];
  printf("%d",sum);

  return 0;
}