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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.
What is actually happening here? How does negating a number result in a negative number less one? I can see that it works, but I'm not sure I understand?
True, but test passes! :D
True. Although probably not important for the 8th kyu. Thanks :)
This solution mught give incorrect result in case multiplication overflows