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: Wrong Answer)

#include <stdio.h>

int main(){
  int howmany,usemany;
  int *snakes;
  int i,j;
  int tmp,total=0;
  
  scanf("%d",&howmany);
  scanf("%d",&usemany);
  
  snakes=(int*)malloc(sizeof(int)*howmany);
  
  for(i=0;i<howmany;i++){
    scanf("%d",&snakes[i]);
  }
  
  for(i=0;i<howmany;i++){
    for(j=i;j<(howmany-1);j++){
      if(snakes[j]<snakes[j+1]){
        tmp=snakes[j];
        snakes[j]=snakes[j+1];
        snakes[j+1]=tmp;
      }
    }
  }
  
  for(i=0;i<usemany;i++){
    total+=snakes[i];
  }
  
  printf("%d",total);
}