using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int numberOfCouples = int.Parse(Console.ReadLine());

            int currentSum = 0;
            int previousSum = 0;

            int numberOne = int.Parse(Console.ReadLine());
            int numberTwo = int.Parse(Console.ReadLine());

            if (numberOfCouples == 1)
            {
                Console.WriteLine($"Yes, value={numberOne+numberTwo}");
                return;
            }

            int currentDiff = 0;
            int maxDiff = 0;

            previousSum = numberOne + numberTwo;

            for (int i = 1; i < numberOfCouples; i++)
            {
                numberOne = int.Parse(Console.ReadLine());
                numberTwo = int.Parse(Console.ReadLine());

                currentSum = numberOne + numberTwo;

                if (currentSum == previousSum)
                {
                    if (currentDiff > maxDiff)
                    {
                        maxDiff = currentDiff;
                    }

                    continue;
                }

                currentDiff = Math.Abs(currentSum - previousSum);

                if (currentDiff > maxDiff)
                {
                    maxDiff = currentDiff;
                }

                previousSum = currentSum;
            }

            if (currentDiff == 0)
            {
                Console.WriteLine($"Yes, value={currentSum}");
            }
            else
            {
                Console.WriteLine($"No, maxdiff={maxDiff}");
            }
        }
    }
}