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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.
There are no sample tests or random tests.
Only two inputs (3 and 13) are tested.
It is a duplicate of Build Tower (and very close to Hollow Triangle and Give me a Diamond).