#include <stdio.h>

int main()
{
int n,m,sum=0,i,g=0;

scanf("%d%d",&n,&m);
int a[n];
for(i=0;i<n;i++){
	scanf("%d",&a[i]);
	sum+=a[i];
}

for(i=0;i<n;i++){
	if(a[i]>=sum/4/m){g++;}
	if(g>=m){break;}
}
if(g>=m){printf("Yes\n");}
else{printf("Yes\n");}
return 0;
}