using System;

namespace EqualPairs
{
    class Program
    {
        static void Main(string[] args)
        {
            int countOfCoupleNumbers = int.Parse(Console.ReadLine());

            int sum = 0;
            int sumOfFirstCoupleNumbers = 0;

            int maxDiff = 0;
            int diff = 0;

            for (int i = 0; i < countOfCoupleNumbers; i++)
            {
                int firstCurrentNumber = int.Parse(Console.ReadLine());
                int secondCurrentNumber = int.Parse(Console.ReadLine());
                sumOfFirstCoupleNumbers = firstCurrentNumber + secondCurrentNumber;

                if (i == 0)
                {
                    sum = sumOfFirstCoupleNumbers;
                }
                else
                {
                    diff = Math.Abs(sum - sumOfFirstCoupleNumbers);
                    sum = sumOfFirstCoupleNumbers;
                }
                if (diff > maxDiff)
                {
                    maxDiff = diff;
                }
            }

            if (diff == 0)
            {
                Console.WriteLine($"Yes, value={sumOfFirstCoupleNumbers}");
            }
            else
            {
                Console.WriteLine($"No, maxdiff={Math.Abs(maxDiff)}");
            }
        }
    }
}