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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.
well explained for the newbies
there are only a few cases in which these smileys are created, if we just create them into one list and then just check them and run the sum function it would be more faster for these test cases.