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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.
Nice solution, simple fors and evicted the need of 2 fors, just one and a clever formula. Good work!
I'm not sure if I just got lucky but I used a sum variable rather than calling the array and that seemed to do the trick. Soo try calling the array less often when doing math?