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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.
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awesome
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My decision is 'group by'. I'll never use 'distinct'.
It is your choice to write code or return the correct result.
Is it a simple puzzle?
-Yes.
Thanks for comment. I will try :-)
I did possible answer in the right way too. Thank you for the comment.
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Yes, array should be sorted.
Yes, you're right!
11:01 is incorrect.
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