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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.
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As I understand this solution relies on the fact that at board will be numbers(0...9). But as I see we can generate other combination of different values that will be accepted by your solution. And what about zero?
You can check vertical and horizontal lines at same cycle.