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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.
Answer 0 is correct.
Left hand side of index 0 is nothing which sums to 0;
Right hand side of index 0 is 10 + (-80) + 10 + 10 + 15+ 35 = 0
This scenario fulfils the question definition.
So the answer is 0
It's a question: a problem in your code is not a kata issue.
You can print the input.
That's exactly the last example in the kata's description.