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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.
HAHAHAHHAHAHA made my day bro
you are overengineering by calculating inner square. Try math induction, write down equations for 2, 3, 4 with X and look for pattern, then simplify equation
nah, in set u have to add more conditions like removing non alphanumerical characters like question marks etc