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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.
Everyone seems to complaining about the validation. What is really cool is the selection of rows and columns and square elements in just a few lines. This can be easily modified to use nested array instead of int.
wow. Beautifully written.
This is much better with linear time complexity. Also, easier to read.
Whew! This is actually really good. Love it. Group by and projection. Never thought of it.
Dear lord. This is not as readable. Good luck decipher this function without a name.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution