#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[j];
			A[j] = A[i];
			A[i] = 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;
}
