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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.
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yes, I think u are right!
I believe tuple would be better here in terms of memory usage
I don't know if sympy is available in CW. The kata does not disallow it though, so you can try.
Do we have to generate primes from scratch, or can we use Python's sympy package?
I have a feeling the message is about 144. Is it possible that your code produces 441, instead of 414, as the next bigger number?