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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.
Maybe check this article: https://docs.codewars.com/training/troubleshooting/#print-input
There is an issue in this kata the test cases run smoothly but when I click attempt it says should work for n = 0 or something above those lines. I tried using and if statment then it says +0 should equal 1 when I change it to return 1 it says 1 should equal 0. I don't know how to debug this. this is the only test cases that isn't working.