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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.
There is no need to round the result, the tests themselves round it.
Tests round answers to 6 decimal places.
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5 - 1,99 = 3,01 and since 3,01 > 3 you are not inside the margin.
Creating algorithm is not derp it's a fun. This is just googling for some functions. :-)
Agree, it was suprisingly rich, for such an easy task. :-D