#include <stdio.h>

int Partition(int A[],int p,int r)
{
  int i,j,x,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;
}

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

  scanf("%d",&n);
  for(i = 0;i < n;i++) scanf("%d",&A[i]);

  a = Partition(A,0,n - 1);
  tmp = A[a];
  A[a] = A[n - 1];
  A[n - 1] = tmp;

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

  return 0;
}

