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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.
New test framework should be used in Python.
Not a suggestion.
The description clearly says that
-1
is expected in such cases, and the previous responses have already clarified this too. Closing.Perhaps you could try to optimise your solution.
This comment is hidden because it contains spoiler information about the solution
according to the instructions if there's no other possible bigger number the return should be -1