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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.
Yep! It's called Binet's formula.
Yup. You can create a function to generate the nth element of a lot of recurrence relations.
Haters gonna hate.
In an alphabet you have 26 characters, so when wrapping around, it is the same to do +13 or to do -13:
But instead of using the modulo-operator (like decent programmers would do, hum hum), he choses to split the problem into two, once +13 and once -13, depending on the character.
Indeed.
That's just overkill.