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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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Thank you very much!
I misunderstood the task
1 + 1 = 2
2 = 2
They are equal.
Сan someone explain to me? Why the sum of even and odd are equal at str = '112'? I counted with a calculator to check myself, I got different sums.