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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.
not as long as your approach stays linear in time.
The problem is with your code, and there is limit on recursionlimit you can set(perhaps that's around < 25000 on CW)
Thas funny XDD