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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.
牛逼！
beautiful
well,that is very funny.i have one solution not be tested which is that you can select one operator and than calcuate the result that the right number and the left,and then put the result in the new
number list and reselect one operator and repeat so on.The only case what i concern is that this alogrithm will overtime>.....