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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.
^^
So, how long? ;)
The kata is perfectly fine, it has been solved more than 36,000 times. Out of curiosity, how long does it take on your ide with
n = 1000000000
?Nothing to fix. Read the description again.