#include <stdio.h>
#include <stdlib.h>
#define N 1000000

int partition(int *,int,int);

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

  scanf("%d",&n);
  if(n<1 || n>N) exit(1);

  A = (int *)malloc(sizeof(int)*n);
  
  for(i=0;i<n;i++){
    scanf(" %d",&A[i]);
    if(A[i]<0 || A[i]>N) exit(2);
  }

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

  for(i=0;i<n;i++){
    if(i>0) printf(" ");
    if(hantei == i) printf("[");
    printf("%d",A[i]);
    if(hantei == i) printf("]");
  }
  printf("\n");

  return 0;
}

int partition(int *A,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 += 1;
	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;
      
}

