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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.
Chuck Norris beats everything, so it's pointless to play with him
K is the position of the digit of Pi your code should return. It is zero-indexed, if k is 0, then your code should return 3, read the description again. It's all there.
No, you didn't, why those loops?