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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.
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i'm getting a very similar problem, and i'm not doing anything to epsilon :/
Hi, as was mentioned in task description, we need iterate until Math::PI - our_calculated > epsilon. You may, possible getting your iterations count by some manipulations with epsilon itself - e.g. take reverse number of it, or so on.
On the right side, where you score is, clan on "view profile" and than put the name of the clan there. You will then be in that clan.