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