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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.
Closing for reasons mentioned above. Please re-raise it if you're still having issues.
Could you show which solution had such problems? I looked at your submitted solutions and others, and they all pass both sample and attempt tests.
It's possible that you modified sample tests by accident, causing some error. Could you confirm this? (hit the reset button and try again)
Weird, but when done it in Prolog, my solution didn't pass the Test, but I tried the Attempt anyway and it passed and I could Submit my solution. Is there a problem with the Tests? Anyone had the same issue?