Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I think you should feel good. While this solution can beat down the given tests, if you gave it a large interval, it would never finish and use up all of your memory, even though there are ways to make it use very little memory and finish in an instant for arbitrarily large intervals.
OMG! I speant all day on my long*&5 answer and this is so simple and clean! great work!