using System;

​

public class Program

{

    public static void Main()

    {

        var n = int.Parse(Console.ReadLine());

        var previousSum = 0;

        var currentSum = 0;

        var maxDifference = 0;

        for (int i = 0; i < n; i++)

        {

            var firstNumber = int.Parse(Console.ReadLine());

            var secondNumber = int.Parse(Console.ReadLine());

            currentSum = firstNumber + secondNumber;

            if (i == 0)

            {

                previousSum = currentSum;

            }

            var difference = Math.Abs(currentSum - previousSum);

            if (difference > maxDifference)

            {

                maxDifference = difference;

            }

            previousSum = currentSum;

        }

        if (maxDifference != 0)

        {

            Console.WriteLine("No, maxdiff=" + maxDifference);

        }

        else

        {

            Console.WriteLine("Yes, value=" + currentSum);

        }

    }

}