using System;

​

namespace OddEvenSum

{

    class Program

    {

        static void Main(string[] args)

        {

            int n = int.Parse(Console.ReadLine());

            int i = 0;

            int odd = 0;

            int even = 0;

​

            for(i = 0; i < n; i++)

            {

                int num = int.Parse(Console.ReadLine());

​

                if(i % 2 == 0)

                {

                    even += num;

                }

                else

                {

                    odd += num;

                }

​

            }

            int diff = Math.Abs(odd - even);

            if(diff == 0)

            {

                Console.WriteLine($"Yes");

                Console.WriteLine($"Sum = {odd}");

            }

            else

            {

                Console.WriteLine($"No");

                Console.WriteLine($"Diff = {diff}");

            }

        }

    }

}

​