#include <stdio.h>
#define N 1000000
int A[N];

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

main()
{
  int n,i,x;
  scanf("%d",&n);
  for(i=1;i<=n;i++)
    {
      scanf("%d",&A[i]);
    }
  x=Partition(1,n);
 for(i=1;i<=n;i++)
   {
     if(i==x)
       {
	 printf("[%d]",A[i]);  
       }
     else
       {
	 printf("%d",A[i]);
       }
     if(i<n)
       {
	 printf(" ");
       }
   }
 printf("\n");
}