#include <stdio.h>
int main(){
    int n,m,x,sum=0,p=0;
    int a[1000];
    scanf("%d %d",&n,&m);
    for (int i = 0; i < n; i++)
    {
        scanf("%d",&a[i]);
        sum=sum+a[i];
    }
    x=sum/(4*m);
    for (int i = 0; i < n; i++)
    {
        if (a[i]>x)
        {
            p=p+1;
        }
    }
    if (p>m)
    {
        printf("Yes");
    }else{
        printf("No");
    }
    
    
}