5.17.OddEvenSum

using System;

namespace OddEvenSum
{
    class OddEvenSum
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var evenSum = 0;
            var oddSum = 0;




            for (int i = 0; i < n; i++)
            {
                if (i % 2 == 0)
                {
                    var num = int.Parse(Console.ReadLine());
                    evenSum = evenSum + num;
                }
                else
                {
                    var num = int.Parse(Console.ReadLine());
                    oddSum = oddSum + num;
                }
            }

            if (oddSum == evenSum) Console.WriteLine("Yes, sum = " + oddSum);
            else Console.WriteLine("No, diff = " + Math.Abs(oddSum - evenSum));
        }
    }
}