#include<stdio.h>
#include<stdlib.h>
int main()
{
    int n,m,a[100],sum=0,count=0,i;
    double x=0;
    scanf("%d",&n);
    scanf("%d",&m);
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
        sum+=a[i];
    }
    
    x=((float)1/(4*m))*sum;
    
    
    for(i=0;i<n;i++)
    {
        if(a[i]>=x)
            count++;
    }
    
    if(count>=m)
        printf("Yes");
    else
        printf("No");
    
    
}