Loading collection data...
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.
yes, my problem was in modifying original array...
read comment about that (in the bottom) a little bit later then my post.
thanks
I got the same issue in ruby :( I don`t know how the answer could be 0 in array of [1, 90] -____-