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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.
\d is short for [0-9]
https://www.regular-expressions.info/shorthand.html
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The squareroot should be save into a variable, instead of being calculated twice.
Time badly wasted.
)) Never mind. Yeah, just unusual
Commmon man, it is a cool kata. I mentioned in the description that this kata is not about coding skill. There is a pattern in the list that should be discovered.
I appologize for wasting your time.
Author of this kata is a fucking dick, so damned this should be an answer for shitty designed tests... Damned.. wasted time.