#include<stdio.h>
#define MAX 100000

int A[MAX],num;

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

  q=parti(0,num-1);

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

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