#include<stdio.h>
#define MAX 100000

int partition(int,int);

int A[MAX],n;

int main()
{
  int i,q;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    {
      scanf("%d",&A[i]);
    }

  q = partition(0,n-1);

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

int partition(int p,int r)
{
  int x;
  int i,j;
  int temp;
  x = A[r];
  i = p-1;

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

  return i+1;
}

