#include <stdio.h>

#define N 100000

int partition(int *A, int p, int r) {
	int x, tmp;
	int i,j;

	x = A[r];
	i = p-1;

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

	return i+1;
}

int main() {
	int n,i;
	int q;
	int A[N];

	scanf("%d", &n);
	for (i = 0; i < n; i++) {
		scanf("%d", &A[i]);
	}

	q = partition(A,0,n-1);
	for (i = 0; i < n; i++) {
		if (i == q) {
			printf("[%d] ", A[i]);
			continue;
		}
		printf("%d", A[i]);
		if (i != n-1) printf(" ");
	}
	printf("\n");

	return 0;
}