#include <stdio.h>

void partition(int[],int,int);

int main()
{
  int a,n,i,j,A[100000];

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

  for(i = 0;i < n;i++)
    {
      if(i >0) printf(" ");
      if(A[i] == a) printf("[");
      printf("%d",A[i]);
      if(A[i] == a) printf("]");
    }
  printf("\n");
  return 0;
}
void partition(int A[],int p,int r)
{
  int a,b,x,i,j;

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

