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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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I know this is 2 years old, but if you know about the format() function you can eliminate your casts to strings & your len() blocks. Then you'd just have the math & a return statement which seems reasonable to me.
br0! yours just fine, see my much more stupid solution you will be shocked as I did
Lol gonna have to second this request. Honestly my favorite part of CodeWars is seeing people do something in 2-5 lines after taking 15-20 to do it myself.