import java.util.Scanner;

public class OddorEvenProduct {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int n = Integer.parseInt(in.nextLine());

        long odd = 1;
        long even = 1;
        String[] numbers = in.nextLine().split(" ");
        for (int i = 0; i < numbers.length; i++) {
            long nums = Long.parseLong(numbers[i]);

            if (i % 2 == 0) {
                odd *= nums;
            } else {
                even *= nums;
            }

        }

        if (odd == even) {
            System.out.printf("yes %d", odd);
        } else {
            System.out.printf("no %d %d", odd, even);
        }

    }
}