#include <stdio.h>

int main(){
	int n,m,i,count = 0;
	int a[110],sum = 0;
	scanf("%d %d",&n,&m);
	for(i=0;i<n;i++){
		scanf("%f",&a[i]);
		sum += a[i];
	}
	int b = sum*1/(4*m);
	for(i=0;i<n;i++){
		if(a[i]>=b) count++;
		if(count>=m){
			printf("Yes\n");
			break;
		}
	}
	if(count<m) printf("No\n");
	return 0;
}