#include <stdio.h>
int main() {
	int n,m,k=0,vote=0;
	int check;
	scanf("%d%d",&n,&m);
	int arr[n+1];
	for(int i=1;i<=n;i++)
	{
	    scanf("%d",&arr[i]);
	    vote=vote+arr[i];
	}
	
	if((vote%(4*m))==0)
	    check=vote/(4*m);
	else
	    check=(vote/(4*m))+1;
	for(int i=1;i<=n;i++)
	{
	    if(arr[i]>=check)
	    k++;
	}
	if(k>=m)
	    printf("Yes\n");
	else
    	printf("No\n");
	return 0;
}