using System;

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

            int a = int.Parse(Console.ReadLine());
            int b = int.Parse(Console.ReadLine());

            int value = a + b;

            int maxDiff = 0;

            for (int i = 1; i < n; i++)
            {
                a = int.Parse(Console.ReadLine());
                b = int.Parse(Console.ReadLine());

                if (Math.Abs(a + b - value) > maxDiff)
                    maxDiff = Math.Abs(a + b - value);

                value = a + b;
            }

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