#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;
}

