#include<stdio.h>
int main(void){
	int n,m,i,cnt=0;
	float sum=0,a[100];
	scanf("%d%d",&n,&m);
	for(i=0;i<n;i++){
		scanf("%f",&a[i]);
		sum+=a[i];
	}
	for(i=0;i<n;i++){
		cnt+=sum/4/m<=a[i];
	}
	printf(m<=cnt?"Yes":"No");
	return 0;
}
