#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);
	//列印
	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;
}