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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.
sorry my bad!
The java version returns the input room as char[][] instead of an int[] at the end of the cockroaches- method.
I am very confused - the function should return an int[] but the signature has char[][] as return type. Any suggestions?