EqualPairs

using System;


class EqualPairs
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        double currentPairSum = 0;
        double biggestPairSum = double.MinValue;
        double smallestPairSum = double.MaxValue;



        for (int i = 0; i < n; i++)
        {
            double firstNumber = double.Parse(Console.ReadLine());
            double secondNumber = double.Parse(Console.ReadLine());
                currentPairSum = firstNumber + secondNumber;
                if (biggestPairSum < currentPairSum)
                {
                    biggestPairSum = currentPairSum;
                }
                if (smallestPairSum > currentPairSum)
                {
                    smallestPairSum = currentPairSum;
                }
            }

        if ((biggestPairSum - smallestPairSum) == 0)
        {
            Console.WriteLine("Yes, value ={0}", currentPairSum);
        }
        else
        {
            Console.WriteLine("No, maxdiff ={0}", biggestPairSum - smallestPairSum);
        }
    }
}