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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.
Nevermind my comment. It was a performance issue. I tried another approach and worked. This is what i like about code wars. Instead of making me just solve the problem anyhow, its actually making think of the "right/proper" solution. Amazing Kata.
I have exact same issue :( Not sure how to submit it. It passes all 60 random tests and just fails to submit saying performance issue.