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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.
Had the same problem, fixed it in the following way.
Your solution doesn't account for rounding. Eave time you loop you should round curr to an integer.
P.S. you can just use p0, you don't have to make curr = p0.
Kata's description is fine, it tells you exactly what you need to do. If you have a suggestion about how to improve it, raise a suggestion, not an issue.