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

#define MAX 2000001
#define VMAX 10000

int n;
int A[MAX];
int partition(int *,int,int);


int main(){
  int i, j=0,p,r;
  scanf("%d",&n);

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

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

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

