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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.
It stopped halfway probably because there are around 400+ tests.
There are plenty of solutions in python without any imports. If you are frustrated, forfeit and have a look at the solutions, some are quite clever.
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Passed: 62 Failed: 0 Exit Code: 1
In this case, what could be the problem?