#include<stdio.h>
int main()
{
    int n,m,a[101],i,sum=0,d,c=0;
    scanf("%d %d",&n, &m);
    for (i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
        sum=sum+a[i];
    }
    d=sum/(4*m);
    for (i=0;i<n;i++)
    {
        if (a[i]>=d)
        {
            c++;



        }

    }
    if (c>=m)
    {
        printf("Yes\n");
    }
    else
    {
        printf("No\n");
    }
    return 0;
}
