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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.
Just checked, no test case beginning with 50 expects "YES" as the answer in any languages.
What language, are you mutating the input?
Same here, if the first customer has 50, it should expect "NO". This is the last test I'm failing so I can't submit.
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