#include <stdio.h>
int main(void){
int n=4,m=1,i,count=0,sum=0;

scanf("%d %d",&n,&m);
int c[n];
for(i=0;i<n;i++){
scanf("%d",&c[i]);
sum+=c[i];}
for(i=0;i<n;i++){
    if(sum/(4*m)<=c[i])
    count++;
}
if(m<=count)
puts("Yes");
else
puts("No");
return 0;
}
