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