import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		Arrays.sort(a);
		if (n == 1) {
			System.out.println(a[0]);
		} else if (n == 2) {
			System.out.println((long) a[0] * a[1]);
		} else if (n % 2 == 1) {
			System.out.println(1);
		} else {
			System.out.println(a[n / 2]);
		}
	}
}