#include <stdio.h>

int partition(int *,int,int);

int main()
{
  int n,i,youso;
  
  scanf("%d",&n);

  int A[n];

  for(i=0;i<n;i++)
    {
      scanf("%d",&A[i]);
    }
  
  youso=partition(A,0,n-1);

  for(i=0;i<n-1;i++)
    {
      if(youso==i)printf("[%d] ",A[i]);
      else printf("%d ",A[i]);
    }

  if(youso==i)printf("[%d]\n",A[i]);
      else printf("%d\n",A[i]);
  
  return 0;
}

int partition(int *A,int p,int r)
{
  int x,i,j,koukan;

  x=A[r];
  i=p-1;
  for(j=p;j<r;j++)
    {
      if(A[j]<=x)
	{
	  i=i+1;
	  koukan=A[i];
	  A[i]=A[j];
	  A[j]=koukan;
	}
    }
  koukan=A[i+1];
  A[i+1]=A[r];
  A[r]=koukan;
  
  return i+1;
}
  
  

