#include <stdio.h>

int main()
{
  int n,m,i;
  int a[102] = {0}, sum = 0 ,count = 0;

  scanf("%d %d", &n,&m);
  for(i=0; i<n; i++)
  {
    scanf("%d", &a[i]);
    sum += a[i];
  }

  for(i=0; i<n; i++)
  {
    if(a[i] >= sum / 4 / m )
      {count++;}
  }

  if(count >= m)
    puts("Yes");
  else
    puts("No");
  return 0;
}
