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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.
If my understanding is correct, when the 2nd parameter ("b", in your case) is 2 or 3, the expected value of n3 should be equal to n2, but n3 is actually set to 0 by your code.
I've had a quick look, but can't say why yet. I did notice the code fails perhaps consistently when
ais a larger number andbis either2or3. Hope that helps.This comment is hidden because it contains spoiler information about the solution