You still can post your code if you need help and get stuck after looking for a solution by yourself, and you'll see if someone answers you. Don't forget to add a spoiler flag if you do that.

Nothing stupid here. If you time out it means your code does not handle properly some cases (think about corner cases maybe?). In an IDE you can only try out the basic tests but the full test battery is more exhaustive and the challenge of a kata is to handle correctly all possibilities.