#include<stdio.h>
void main()
{
  int n,m,i,a,b,count=0;
  scanf("%d %d",&n,&m);
  int arr[101],sum=0;
  for(i=0;i<n;i++)
  {
    scanf("%d",&arr[i]);
    sum=sum+arr[i];
  }
  a=4*m;
  b=sum/a;
  for(i=0;i<n;i++)
  {
    if(b<=arr[i])
      count++;
  }
  if(count>=m)
    printf("Yes");
  else
    printf("No");
}
