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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.
I have passed all the test cases,but the cost of time is over, so i failed!
Definitely the easiest 4 kyu I've done.
The practiser need to pay more attention to remove the ending whitespace in every lines.
The regular expression is so clever.
I dont kow why the programming always runs out of time, though i used the asynchronous ways.
That's what that means.
The element in the array only can be used once. The questions descrption dont tell it.
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