#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(){
	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;
	
}
