using System;

public class Program
{
    public static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int value1 = 0;
        int value2 = 0;
        int diff = 0;
        int maxDiff = 0;

        for (int i = 0; i < n; i++)
        {
            value1 = value2;
            value2 = 0;
            value2 += int.Parse(Console.ReadLine());
            value2 += int.Parse(Console.ReadLine());

            if(i > 0)
            {
                diff = Math.Abs(value1 - value2);

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

        if (maxDiff == 0)
        {
            Console.WriteLine("Yes, value = " + value2);
        }
        else
        {
            Console.WriteLine("No, maxdiff = " + maxDiff);
        }
    }
}