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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.
I ran into the issue with complex number. It was just because the first test is for -1 and you can't take the square root of a negative number. That's why I ended up checking for a negative a number and returning False. The solution we're under also checked that n was positive before returning True
more!!! more!!!!!!