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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.
How he figured that out? Wow
I just tried to see is it possible to solve kata with O(n) complexity. And suddenly it said "job done". But you can see on line 10 - I just returned false 10 times.
It is coincedence 10 times same answer. lol