#include<stdio.h>

int main()
{
  int n = 0;
  int m = 0;
  int a[1005];
  int sum = 0;
  int bord = 0;
  int jud = 0;
  
  scanf("%d %d",&n,&m);
  for(int i = 0;i < n;i++)
  {
    scanf("%d",&a[i]);
    sum += a[i];
  }
  bord = sum/(4*m);
  for(int j = 0;j < n;j++)
  {
    if(a[j] >= bord)
    {
      jud++;
    }
  }
  if(jud >= m)
  {
    printf("Yes");
  }
  else
  {
    printf("No");
  }
    return 0;
}