#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;
}
