using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace pairs
{
    class Program
    {
        static void Main(string[] args)
        {

            var number = double.Parse(Console.ReadLine());

            double a = 0;
            double b = 0;
            double sum = 0;
            double tempMin = 0;
            double temp2 = 0;
            double sum2 = 0;
            double max = 0;
            double avg = 0;




            for (int i = 1; i <= number; i++)
            {

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

                sum = a + b;

                sum2 += sum;



                if (i == 1)
                {
                    tempMin = sum;

                    temp2 = sum;
                }

                  if (tempMin > sum)
                    {
                        tempMin = sum;
                    }
                    else if (temp2 < sum)
                    {
                        temp2 = sum;
                    }

                max = temp2 - tempMin;
                avg = max;
                if (max < avg)
                {
                    max = avg;
                }

                }


            if ((sum2 / number) == sum)
            {
                Console.WriteLine("Yes, value={0}", sum);
            }
            else
            {

                Console.WriteLine("No, maxdiff={0}",max);
            }
        }
    }
}