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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.
Seems not efficient
lol
Cool :) I used to have similar exercise with lets call it "reversed polish notation". It wasnt much difficult with this approach but '-' is quite tricky.
No, read the description again. You need to apply those steps. You skipped 1 and 2 and directly jumped to step 3.
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Need for rounding result, meh... badly made unit tests.
Noiz