using System;
using System.Numerics;

namespace TelerikTests
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.ReadLine();

            string[] array = Console.ReadLine().Split(' ');

            BigInteger oddProduct = 1;
            BigInteger evenProduct = 1;

            for (int i = 0; i < array.Length; i++)
            {
                if ((i + 1) % 2 == 0)
                {
                    evenProduct *= BigInteger.Parse(array[i]);
                }
                else
                {
                    oddProduct *= BigInteger.Parse(array[i]);
                }
            }

            if (oddProduct == evenProduct)
            {
                Console.WriteLine("yes " + oddProduct);
            }
            else
            {
                Console.WriteLine("no " + oddProduct + " " + evenProduct);
            }
        }
    }
}