I am new to Kattis and trying solve the challenge Jumbo Javelin with C# but I get run time error even though I am exiting my program with 0.

Here is my code:

```
using System;

namespace JumboJavelin
{
    class Program
    {
        static void Main(string[] args)
        {
            int l = int.Parse(Console.ReadLine());
            int sum = 0;
            int loss = 1;

            for (int n = 0; n <= 100; n++)
            {
                sum += l;

                if((n + 1) % 2 == 0 && !n.Equals(0))
                {
                    sum -= ((n + 1) / 2)*loss;
                }

                try
                {
                    l = int.Parse(Console.ReadLine());
                }
                catch (FormatException)
                {
                    break;
                }
            }
            Console.WriteLine(sum);
            Environment.Exit(0);
        }
    }
}

```

Can someone please help me? I know my solution eventually outputs the wrong answer but right now I am trying to get rid of the run time error since it works perfectly fine on Visual Studio 2019.
All help is appreciated. Thanks