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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.
That's right, but no algorithm can distinguish between a missing first element and a missing final element.
Very nice but could the problem say explicitly that the lap lengths are integers?
not any = all not
I love this solution & playing with it.
But I have trouble with this test case:
group_check('a')
False
There's no stack yet.
Ah, maybe the problem statement is saying s can only contain ()[]{}. Hard to tell for sure.