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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.
bro said my brain stupid in 103 ways
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Haha. Ya. When learn and pratic coding trying to do use abstraction (may i only thinking that?). But that cheating is streight step)
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How does the from_roman catch things like "IX" being equal to 9?
Uff, the code is really short but recursion doesn't convince me.
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How about using set?? It is more faster than using sort, unique, erase.
easy to read and so similiar with me. Very Good