#include<stdio.h>

int main()
{
    int n,m;
    scanf("%d %d",&n,&m);

    int a[n],sum=0,c=0;
    for (int i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
        sum+=a[i];
    }
    int x=4*m;
    int h=sum/x;
    if (sum%x!=0)
        h++;
    for (int i=0;i<n;i++)
    {
        if (a[i]>=h)
            c++;
    }
    if (c>=m)
        printf("Yes\n");
    else
        printf("No\n");

    return 0;
}
