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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.
this is 1D mine is 2D array
to be honest I don't know Testing if you know some tutorial i will be thankful for you
only python and c# ?
where java, c, c++, JavaScript?
the hardest kata