#include<stdio.h>
int main(void){
	int t,n,m,e,ask,vot=0,sum=0;
	int a[10000];
	scanf("%d%d",&n,&m);
	for(t=0;t<n;t++){
		scanf("%d",&a[t]);
		sum=sum+a[t];
	}
	ask=sum/(4*m);
	if(sum%(4*m)!=0){
		ask=ask+1;
	}
	for(e=0;e<n;e++){
		if(a[e]>=ask){
			vot=vot+1;
		}
	}
	if(vot>=m){
		printf("Yes");
	}else{
		printf("No");
	}
	return 0;
}