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.
You may revise both the problem and the solution if you wish, then convince me of your point of view. However, if you choose not to do so, that's perfectly fine. I provided those comments mainly for anyone who might find your previous explanation, ehh... a bit strange or with flawed logic. And I did it only for educational reasons.
Because the point of the kata is to implement your own operation, not use an extern library and solve the kata in one line. This is a 4 kyu, expect it to be somehow hard.