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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.
Next time, please use the question label for a question, the issue label is reserved for problems with the kata itself.
And to answer your question : keep in mind that both players play optimally. For example, with
n = 69, Bob can constrain Alice to take only one card each time it is her turn. The beginning of that game is: