#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define N 100000

int n;

int partition(int *,int,int);

int main(){
  int i,k,A[N];

  scanf("%d",&n);

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

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

  return 0;
}

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

     /* A[i] と A[j] を交換*/
   }


   temp=A[i+1];
   A[i+1]=A[r];
   A[r]=temp;
   /*A[i+1] と A[r] を交換*/
   return i+1;
 }

