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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.
No, the question specifies this: a subarray is a contiguous subsequence.
I agree!
If the string doesn't have a newline at the end, it doesn't want us to add it in - okay, I can understand that.
But then if there are only newlines, it wants us to return, then shouldn't they be included in the output? Now it wants ''???