#include <stdio.h>

int	main(void)
{
  	int	n;
  	int m;
  	int a[101];
  	int	i;
  	int num;
  	long long	sum;
  	double th;
  	int cnt;
  
  	num = scanf("%d %d\n", &n, &m);
 	if (num != 2)
      	return (0);
  
  	sum = 0;
  	for(i=0;i<n;i++)
    {
      	num = scanf("%d", &a[i]);
      	if (num != 1)
          	return (0);
      	sum += a[i];
    }
  
  	th = (double)sum / 4 / m;
  
  	cnt = 0;
  	for(i=0;i<n;i++)
    {
      	if (a[i] >= th)
          	cnt++;
    }
  	if (m <= cnt)
      	printf("Yes");
  	else
      	printf("No");
  	return (0);
  
}