EqualPairs

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

namespace Equal_Pairs
{
    class Equal_Pairs
    {
        static void Main(string[] args)
        {
            int Sum = 0;
            int NextSum = 0;
            int Difference = 1;
            int MaxDifference = 0;
            int n = int.Parse(Console.ReadLine());
            for (int i = 1; i <= n; i++)
            {
                Sum = NextSum;
                int number1 = int.Parse(Console.ReadLine());
                int number2 = int.Parse(Console.ReadLine());
                NextSum = (number1 + number2);
                Difference = Math.Abs(NextSum - Sum);
                if ((Difference > MaxDifference) && (i >= 2)) MaxDifference = Difference;
            }
            if (MaxDifference == 0) Console.WriteLine("Yes, value " + NextSum);
            else Console.WriteLine("No, maxdiff " + MaxDifference);
        }
    }
}