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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.
im going to squeeze lemon in my eyes if someone else does this
better but if i'm not in a mistake the rule is make your own sum, not use the sum of python...
and you need to check if is an array or not... what is an array? think about it is an instance of...
best