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

int partition(short*,int,int);
int main()
{
  unsigned short *A;
  int n,i,s;
  scanf("%d",&n);

  A = malloc(sizeof(short)*n+1);

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

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

  return 0;
}
int partition(short *A,int p,int r)
{
  int x,a,i,j;
  x = A[r];
  i = p-1;

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

  return i+1;
}
