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.
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a lot of hardcoded values ;)
About "return 0 too", i think it would be better to change description to "method should return 0 too", because u can misread it as "sub array should return 0 length".