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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.
try changing arond the value of pi to be within 5 decimal digits?
i had an value difference that actually made this longer than it should have been by using 3.14159265358979323846264 as pi, but passed all tests when changed to only 3.14159