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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.
The description could clarify that no parameter
xis provided, instead, it simply refers to the common sum of all rows/columns/diagonals if such exists (i.e. the user has to figure out some valuexto compare to).