Pairs

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

namespace Pairs
{
    class Pairs
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            string[] nums = input.Split(' ');
            int firstElement = int.Parse(nums[0]);
            int secondElement = int.Parse(nums[1]);
            int prevSum = firstElement + secondElement;
            int maxDiff = 0;
            for(int i = 2; i < nums.Length - 1; i += 2)
            {
                firstElement = int.Parse(nums[i]);
                secondElement = int.Parse(nums[i + 1]);
                int lastSum = firstElement + secondElement;
                int diff = Math.Abs(lastSum - prevSum);
                maxDiff = Math.Max(diff, maxDiff);
                prevSum = lastSum;
            }
            if (maxDiff == 0)
            {
                Console.WriteLine("Yes, value=" + prevSum);
            }
            else
            {
                Console.WriteLine("No, maxdiff=" + maxDiff);
            }
        }
    }
}