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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 a kata suggestion~~
What is your problem? 14 guys passed the C++ kata and I'm pretty sure there are no error in the tests that are the same in all languages. Don't take the habit of posting an issue when your code doesn't work and at least explain your problem:-)
Yes I know the problem...
There are no errors in the tests and unfortunately CW C++ tests report "unsupported type" when your result is wrong instead of "expected... but got ...".
I think you have to modify your code to pass the kata.