using System;

​

public class Program

{

    public static void Main()

    {

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

​

        int evenSum = 0;

        int oddSum = 0;

​

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

        {

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

​

            if (i % 2 == 0)  

            {

                evenSum += number;

            }

            else  

            {

                oddSum += number;

            }

        }

​

        if (evenSum == oddSum)

        {

            Console.WriteLine("Yes");

            Console.WriteLine("Sum = " + evenSum);

        }

        else

        {

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

            Console.WriteLine("No");

            Console.WriteLine("Diff = " + diff);

        }

    }

}

​