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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.
For 4 kyu it is too easy, because even not very smart I was able to do it by writing my terrible code. (that's my first 4kyu, others are much more difficult)
oh, right. I wasn`t attentive
C++
Looks like some kind of mistake. Shouldn't the answer be 13999999999?
Input: 14661312716
Expected: equal to 9999999999
Actual: 13999999999
Too easy for 6kyu. Anyway, thanks!
That was hard. Thank you for nice Kata!