#include<stdio.h>
#include<math.h>
int main()
{
  int n,m,a[20],i,c=0,t,sum=0;
  scanf("%d%d", &n,&m);
  for (i=1; i<=n; i++)
  {
    scanf("%d", &a[i]);
    sum=sum+a[i];
  }
  t=ceil(1/(4*m)*sum); 
  for (i=1; i<=n; i++)
  {
    if(t>a[i])
    {
      c++;
    }
  }
  if(c<=m)
  {
    printf("Yes");
  }
  else
  {
    printf("No");
  }
  return 0;
}