#include<stdio.h>
#include<stdlib.h>

int partition( int *, int, int );

int main()
{
  int i, n, k, *A;

  scanf("%d", &n);
  A = malloc( n * sizeof(int));
  for( i=0; i<n; i++ ) scanf("%d", &A[i]);

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

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

  return 0;
}


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

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

  for( j=p; j<r; 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;
}

