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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.
That makes a lot of sense. Thank you so much!
Thank you so much. Could you explain more as to why the
prev = [(0,0)]part intrudces a subtle bug? Does it have something to do with how it is stored in global environment as opposed to local one within each iteration of recursion? And why don't I see the same problem with other parameters: i.e.,x=0, y=0?This comment is hidden because it contains spoiler information about the solution