SimpleLoops/EqualPirs

using System;
using System.Globalization;

namespace lab12.EqualPairs
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());

            double numberStart1 = double.Parse(Console.ReadLine(), NumberFormatInfo.InvariantInfo);

            double numberStart2 = double.Parse(Console.ReadLine(), NumberFormatInfo.InvariantInfo);

            double startSum = numberStart1 + numberStart2;

            double maxDiff = 0;

            for (int i = 0; i < num - 1; i++)
            {
                double number1 = double.Parse(Console.ReadLine(),NumberFormatInfo.InvariantInfo);

                double number2 = double.Parse(Console.ReadLine(), NumberFormatInfo.InvariantInfo);

                double currentSum = number1 + number2;

                double currentDiff = Math.Abs (startSum - currentSum);

                if (currentDiff > maxDiff)
                {
                    maxDiff = Math.Abs(startSum - currentSum);
                }

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

        }
    }
}