I have thought for hours about this. On several occasions.
Can you give me some hint what trick might be hidden there?

I worked out a mathmatical expression. It only fails in some octal cases (8,6) (8,7).

I have no idea why it isn't working and I already asked a question a week ago.

Could you show the expected results? Because if I had the results, maybe I could see my mistake as no one aswered my first question.

It passed the test because the biggest Roman Numeral possible is 3999 = MMMCMXCIX.

You overshot your goal...

Thank you very much.

My check if x == 0 was before y == 0.
I swapped the checks and it works now.

Must raise ZeroDivisionError
Log
Expected error was thrown: Error: ZeroDivisionError

The only testcase, which doesn't work yet.

I throw the Error like this:

throw new Error("ZeroDivisionError")

What do I have to do differntly?

This thing broke while loops.

I decrement var i in while(){}.
When it reenters while, (because of the condition) i is the value before.

The increment is somewhere far below the while loop.

You broke Math...

10 = X = 10 000
Nice...

What is the regex doing?

I did a new solution.
Why doesn't it show under "View Mine"?

Probably Copy Paste.
(I hope)