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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.
One day, I'll be able to Play around with Code like this too.
Some people are on here to make theirselves stonger at algorithms, so they prefer not to use already built-in functions, building built-in functions yourself from scratch is a good training to make yourself better.
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The simplest solution and quickest
it's just obfuscated code, why people upvote this garbage?