Problem:
Score : 200 points

Problem Statement

We have held a popularity poll for N items on sale. Item i received A_i votes.

From these N items, we will select M as popular items. However, we cannot select an item with less than \dfrac{1}{4M} of the total number of votes.

If M popular items can be selected, print Yes; otherwise, print No.

Constraints

1 \leq M \leq N \leq 100

1 \leq A_i \leq 1000

A_i are distinct.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N M
A_1 ... A_N

Output

If M popular items can be selected, print Yes; otherwise, print No.

Sample Input 1

4 1
5 4 2 1

Sample Output 1

Yes

There were 12 votes in total. The most popular item received 5 votes, and we can select it.

Sample Input 2

3 2
380 19 1

Sample Output 2

No

There were 400 votes in total. The second and third most popular items received less than \dfrac{1}{4\times 2} of the total number of votes, so we cannot select them. Thus, we cannot select two popular items.

Sample Input 3

12 3
4 56 78 901 2 345 67 890 123 45 6 789

Sample Output 3

Yes

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

int main(){
	long n,m,i;
  	long *data,total=0,count=0,try;
 	double cutOff; 
  	scanf("%ld%ld",&n,&m);
  	data=(long int*)malloc(sizeof(long int)*n);
  
  	for(i=0;i<n;i++){
    	scanf("%ld",&data[i]);
      	total+=data[i];
    }
  	cutOff=total/(4*m);
  	
  
  
  	for(i=0;i<n;i++){
    	if(data[i]>=cutOff)
          	count+=1;
    }
  
  	if(count>=m)
      	printf("Yes");
  	else
      	printf("No");
  
}