using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input numbers separated by + sign");

        string splitinput = Console.ReadLine();

        string[] i = splitinput.Split('+');

        int sum = 0; int N = 0;

        foreach (string s in i)

        {

            //JH - no need to have this check ... if the array 'i' is empty the foreach will not execute

            //if (s.Length > 0)

            //{

​

                bool isNum = Int32.TryParse(s, out N);

                if (isNum)

                {

                    // JH - no need to have this second TryParse

                    //if (Int32.TryParse(s, out N))

                    //{

                        sum += N;

                    //}

                }

            //}

        }

        Console.WriteLine("Sum={0}", sum);

        Console.ReadLine();

    }

}