#include <stdio.h>

int main(void)
{

    int n,m,a[1000],x=0,y=0,w=0,i;

    scanf("%d%d",&n,&m);

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

     y=(double)1/4*m;

     for(i=0;i<n;i++){
         if(a[i]>=y) w++;
     }

     if(m<=w)  printf("Yes\n");
     else if(m>w)  printf("No\n");

     

     return 0;
}
