#include <stdio.h>
#define MAX 100000

int A[MAX];

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

int main(void)
{
	int n, i, p;
	
	scanf("%d", &n);
	for(i = 0; i < n; i++)scanf("%d", &A[i]);
	
	p = partition(0, n-1);
	
	for(i = 0; i < n; i++){
		if(i != 0)printf(" ");
		if(i == p)printf("[%d]", A[i]);
		else printf("%d", A[i]);
	}
	printf("\n");
	
	return 0;
}

