using System;

namespace Exceptions
{
    class LoException : System.Exception
    {
        public this(){}
    }

    class HiException : System.Exception 
    {
        public this(){}
    }

    public module App 
    {
        mutable Lo : int;
        mutable Hi : int;
        mutable count : int;

        public Main(args : array[string]) : void
        {
            def n = int.Parse(args[0]);
            for (count = 0; count < n; count = count + 1) 
            {
                SomeFunction();
            };
            def bldr = System.Text.StringBuilder(100);
            def _ = bldr.Append("Exceptions: HI=").Append(Hi).
              Append(" / LO=").Append(Lo);
            Console.WriteLine(bldr.ToString());
        }

        public SomeFunction() : void
        {
            try 
            {
                HiFunction();
            } 
            catch {
              | e => 
                Console.WriteLine("We shouldn't get here: " + e.Message);
            }
        }

        public HiFunction() : void
        {
            try 
            {
                LoFunction();
            } 
            catch {
              | _ is HiException =>
                Hi = Hi + 1;
            }
        }
        public LoFunction() : void
        {
            try 
            {
                BlowUp();
            } 
            catch {
              | _ is LoException =>
                Lo = Lo + 1;
            }
        }
        public BlowUp() : void
        {
            if ((count % 2) == 0) 
            {
                throw LoException();
            } 
            else 
            {
                throw HiException();
            }
        }
    }
}