Pairs

using System;

class Pairs
{
    static void Main(string[] args)
    {
        string str = Console.ReadLine();
        int[] numsSep = Array.ConvertAll(str.Split(' '), int.Parse);
        int length = numsSep.Length;
        int[] nums = new int[(length/2)];

        for (int i = 0; i < numsSep.Length; i++)
        {
            nums[(i / 2)] += numsSep[i];
        }

        int firstValue = nums[0];
        bool areEquals = true;

        foreach (var item in nums) {
            if (firstValue != item) {
                areEquals = false;
            }
        }

        if (areEquals){
            Console.WriteLine("Yes, value={0}", firstValue);
        }
        else {
            int maxDiff = int.MinValue;
            for (int i = 0; i < ((length/2) - 1); i++) {
                if (Math.Abs(nums[i] - nums[i + 1]) > maxDiff) {
                    maxDiff = Math.Abs(nums[i] - nums[i + 1]);
                }
            }
            Console.WriteLine("No, maxdiff={0}", maxDiff);
        }
    }
}