using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

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


            for (int i = 0; i < n * 2; i++)
            {
                int numbers = int.Parse(Console.ReadLine());
                if (i % 2 == 0)
                {
                    evenSum += numbers;
                }
                else if (i % 2 != 0)
                {
                    oddSum += numbers;
                }
            }

            if (evenSum==oddSum)
            {
                Console.WriteLine("Yes, sum=" + evenSum);
            }
            else if (evenSum!=oddSum)
            {
              int diff = Math.Abs(evenSum - oddSum);
                Console.WriteLine("No, diff=" + diff);
            }

        }
    }
}