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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.
i dont know it how to work
chinese friends!!!
do you need to explain now? math soluation?
dont_stop_only_at_leaves
elegant code
I thinks fabs() function is better for this example, because usually abs(int) in Standard C