#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;j++){
		if(A[j] <= x){
		i++;
		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(void){
	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>0)printf(" ");
	if(i == q)printf("[");
	printf("%d",A[i]);
	if(i == q)printf("]");
	}
	
	printf("\n");
	
	return 0;


}
