#include<stdio.h>
#define MAX 100000

int partition(int *,int,int);

int main()
{
  int n,i,x;
  int A[MAX];

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

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

  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-1;j++){
    if(A[j] <= x){
      i = 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;
}