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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.
This is a 5+ kyu for sure.
Try the sister kata https://www.codewars.com/kata/539a0e4d85e3425cb0000a88/ if you haven't done it. They look similar but are different; solving them will definitely make people learn more.
lambda calculus :)
its bad practice, and then you cant use pythons function anymore.
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p0 * percent- you're decreasingp0instead of increasing it.