#include <stdio.h>
int patition(int a[100000], int p, int r) {
	int x, i, j, tmp;

	x = a[r];
	i = p - 1;
	for (j = p; j < r; j++) {
		if (a[j] <= x) {
			i += 1;
			tmp = a[j];
			a[j] = a[i];
			a[i] = tmp;
		}
	}
	tmp = a[i+1];
	a[i+1] = a[r];
	a[r] = tmp;
	return i + 1;
}

int main(void) {
	int in[100000], n, i, p;
	const char *fmt = "%d";

	scanf("%d", &n);
	for (i = 0; i < n; i++) {
		scanf("%d", in+i);
	}
	p = patition(in, 0, n-1);

	for (i = 0; i < p; i++) {
		printf(fmt, in[i]);
		fmt = " %d";
	}
	printf(" [%d]", in[p]);
	for (i = p+1; i < n; i++) {
		printf(fmt, in[i]);
	}
	putchar('\n');
	return 0;
}