Equal-Pairs

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

namespace Equal_Pairs
{
    class Program
    {
        static void Main(string[] args)
        {
            int count = int.Parse(Console.ReadLine());
            double value = 0.0;
            double difference = 0.0;

            for (int i = 1; i <= count; i++)
            {
                double firstNumber = double.Parse(Console.ReadLine());
                double secondNumber = double.Parse(Console.ReadLine());

                if (value != 0)
                {
                    difference = Math.Max(difference, Math.Abs(value - (firstNumber + secondNumber)));
                }

                value = firstNumber + secondNumber;

            }

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