using System;

namespace OddEqualsEven
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int[] numbers = new int[n];

            for (int i = 0; i < n; i++)
            {
                numbers[i] = int.Parse(Console.ReadLine());
            }

            int productOdd = 1, productEven = 1;
            for (int i = 0; i < numbers.Length; i++)
            {
                if (i % 2 == 0)
                {
                    productOdd *= numbers[i];
                }
                else
                {
                    productEven *= numbers[i];
                }
            }

            if (productEven == productOdd)
            {
                Console.WriteLine("yes {0}", productEven);
            }
            else
            {
                Console.WriteLine("no {0} {1}", productOdd, productEven);
            }
        }
    }
}