#include <stdio.h>
#define N 100000
int partition(int,int);

int A[N],n;

int main()
{
  int i,p;
  scanf("%d",&n);
  for(i=0;i<n;i++)
  {
    scanf("%d",&A[i]);
  }
  p = partition(0,n-1);
  for(i=0;i<n;i++)
  {
    if(i)
      printf(" ");
    if(i==p)
      printf("[");
    printf("%d",A[i]);
    if(i==p)
      printf("]");
  }
printf("\n");
return 0;
}
int partition(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;
}

