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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.
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add the below codes to the first line of LCS function:
这是一种极其巧妙的方法,当然也只是节省了代码,性能上估计很堪忧。而且可扩展性方面堪忧。