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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 didn't measure.
Got the time-out error here for n-1 then n-2, but it accepted the other way around.
Not sure why
This took more than 12 seconds.
Recursing for n-2 before n-1 worked though