#include<stdio.h>

#define N 100000

int partition(int *, int, int);

int main()
{
  int i, n, j;
  int A[N];

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

  j = partition(A, 0, n-1);

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

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

  x = A[r];
  i = p-1;

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

  return i+1;
}