i can not understud why my program get crash.
But on my computer it works!
this is the source code:
////////////////////////////////////
using System;

class MAIN
{
    public static int Main()
    {
        int a, b;
        a = Int32.Parse(Console.ReadLine());
        b = Int32.Parse(Console.ReadLine());

        Console.WriteLine(a+b);
        return 0;
    }
}
/////////////////////////////