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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.
Yes, Issue already raised below (I updated all languages I could, but couldn't do that one, so it still uses the original test suite which is just... bad).
If you can update it plz translate the Java or JS version to C++ (posting a fork of the original translation).
closing (as duplicate) & cheers