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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.
It's interesting that most of the Haskell solutions are somewhat similar
Heh, yeah. I'm aware. I wouldn't use it if I wasn't writing for limited test cases.
Also my solution returns False for "([{)]}" but it is valid according to statement
My parents will punish me for that...