#include <stdio.h>
#define MAX 100000

int A[MAX],n;

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

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

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

