#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int parti(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 = parti(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;
}