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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.
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Separately simple tests pass completely, but if you try to pass full tests, they fall with the wrong answer.
If you run the program via clang++ on my computer, then the same tests pass and output what they ask for.
wtf with tests on c++