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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 think the solution with computing all numbers isn't fit for the production based on the performance issue.
@daimonji, I had the same thought but did not know how to implement it. In your code, 'if poss[c]' is always False as both values in poss are equal to 0. Can you explain?
@Haksell, correct.
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