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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.
i have same issue, it's only spitting out result as a string on 2 tests, all others pass. My code is 39 characters
for whatever reason, your code is spitting out strings. Use the math.floor shortcut (~~) to force output to be an int