#include<stdio.h>
#define MAX 100000

int A[MAX], n;

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++;
			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;
}

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