using System;

namespace Odd_and_Even_sum
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());
            int sumEven = 0;
            int sumOdd = 0;
            int input = 0;

            for (int i = 0; i < num; i++)
            {
                input = int.Parse(Console.ReadLine());

                if (i % 2 == 0)
                {
                    sumEven += input;
                }
                else
                {
                    sumOdd += input;
                }
            }

            if (sumEven == sumOdd)
            {
                Console.WriteLine($"Yes");
                Console.WriteLine($"Sum = {sumOdd}");
            }

            else
            {
                int diff = sumEven - sumOdd;
                Console.WriteLine($"No");
                Console.WriteLine($"Diff = {Math.Abs(diff)}");
            }

        }
    }
}