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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.
有趣的題目！以簡短為目標或以效率為目標會寫出完全不同的程式碼，作為新手教學的練習題很有價值