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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.
Yeah, I see now. Unfortunately these people exploited the way I used to make their life easier. :) Well, that's what people usually do.
I updated the kata to retain this easiness but making exploiting harder. :)
The cheating solutions are now marked invalid, of course.
Thanks for noticing!
No, I have not. What's the point?
Everything is not hard after you do it P:
It is difficult not for implementing, but for understanding due to blurred definitions. The exact sequence of actions is not clear. I was able to solve the problem only when rephrase "the end of the even month" to "beginning of odd month".