#include<stdio.h>
#include<string.h>
#include<ctype.h>
#include<math.h>

int main(){
	/*freopen("in.txt.txt","r",stdin);
	freopen("out.txt.txt","w",stdout);*/
	int n,m;
	scanf("%d %d",&n,&m);
	int a[n];
	int sum=0;
	int count=0;
	int i;
	for(i=0;i<n;i++){
		scanf("%d",&a[i]);
		sum+=a[i];
	}
	i=0;
	for(i=0;i<n;i++){
		if(a[i]>=sum/(4*m)) count++;
	}
	if(count>=m) puts("Yes");
	else puts("No");
	return 0;
}