Exam 5. Pairs

namespace _2.Pairs
{
    using System;
    using System.Collections.Generic;

    public class Pairs
    {
        public static void Main(string[] args)
        {
            checked
            {
                string lineNums = Console.ReadLine();

                string[] splitNums = lineNums.Split(' ');
                bool isEqualsPairs = true;
                int num1 = int.Parse(splitNums[0]);
                int num2 = int.Parse(splitNums[1]);
                int previousPair = num1 + num2;
                int maxDiff = 0;
                for (int i = 2; i + 1 < splitNums.Length; i += 2)
                {
                    num1 = int.Parse(splitNums[i]);
                    num2 = int.Parse(splitNums[i + 1]);
                    int sumPair = num1 + num2;
                    if (sumPair != previousPair)
                    {
                        isEqualsPairs = false;
                        int diff = Math.Abs(sumPair - previousPair);
                        if (diff > maxDiff)
                        {
                            maxDiff = diff;
                        }
                    }

                    previousPair = sumPair;
                }

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