using System;

namespace Bumbers_N_to_1
{
    class Program
    {
        static void Main(string[] args)
        {
            int evenSum = 0;
            int oddSum = 0;
            int n = int.Parse(Console.ReadLine());


            for (int i = 1; i <= n; i++)
            {

                int element = int.Parse(Console.ReadLine());
                if (i % 2 == 0)
                {
                    evenSum += element;

                }
                else
                {
                    oddSum += element;
                }
                if (evenSum == oddSum)
                {
                    Console.WriteLine("Yes");
                    Console.WriteLine($"Sum = {evenSum}");
                }
                else
                {
                    Console.WriteLine("No");
                    Console.WriteLine($"Diff = {Math.Abs(evenSum - oddSum)}");
                }

            }



        }
    }
}