#include<stdio.h>
int main ()
{
    int n,m;
    scanf ("%d%d",&n,&m);
    int arr[n],count,i;
    int sum =0;
    for (i = 0 ; i< n ;i++)
    {
        scanf ("%d",&arr[i]);
        sum = sum+arr[i];
    }
    sum = sum/(4*m);
    count=0;
    for (i = 0 ;i <n ;i++)
    {
        if (arr[i]>= sum)
        {
            count++;
        }
    }
    if (count >= m)
        printf ("Yes\n");
    else printf ("No\n");
    return 0;
}
