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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.
Not possible, since any such change would invalidate current accepted solutions, and currently no solutions have been invalidated.
Hi,
no, with 500+ other completions in PHP, the tests aren't broken. When you click "TEST", your solution is run against more tests than the ones you see in the sample tests part. And those tests are randomized. Meaning your only problem is that your code doesn't handle some specific case you didn't think about. Just print the inputs to the console, then debug your code.
Cheers
PS: