using System;

public class Program

{

    public static void Main()

    {

        {

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

            var oddSum = 0;

            var evenSum = 0;

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

            {

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

                if (i % 2 == 0) evenSum += num;

                else oddSum += num;

            }

            if (oddSum == evenSum)

            {

                Console.WriteLine("Yes");

                Console.WriteLine("Sum = {0}", oddSum);

            }

            else

            {

                Console.WriteLine("No");

                var diff = Math.Abs(oddSum - evenSum);

                Console.WriteLine("Diff = {0}", diff);

            }

        }

    }

}