#include<stdio.h>

#define MAX 100000

int partition(int A[],int p,int r);

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

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

  par = partition(A,0,n-1);

  printf("%d",A[0]);
  for(i = 1;i < n;i++){
      printf(" ");
 
    if(i == par){
      printf("[");
    }
    printf("%d",A[i]);
    if(i == par){
      printf("]");
    }
  }
  puts("");

  return 0;
}




int partition(int A[],int p,int r){
  int x,i,j;
  int temp;
    
  x = A[r];
  i = p-1;
  for(j = p;j <= r-1;j++){
    if(A[j] <= x){
      i = i+1;
      
      temp = A[i];
      A[i] = A[j];
      A[j] = temp;
    }
  }
  temp = 0;
  temp = A[i+1];
  A[i+1] = A[r];
  A[r] = temp;

  return i+1;
}

