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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.
Quite right, luckily that didn't come up in the test cases! My fork should have fixed this now (terminating condition returns false if array not of a valid structure, i.e. length not a triangle number), whilst still keeping original solution functional!
Thanks.
But I see his Python solution? :)
He can not see your comment ;-)
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