#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) printf(" ");
		if(i == q) printf("[");
		printf("%d", A[i]);
		if(i == q) printf("]");
	}
	printf("\n");
	
	return 0;
}
