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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.
The message is telling you your solution returned 2 for that input. The correct answer is, indeed, 1.
I really not understand where is the mistake, is only 1 change from negative to positive arr[3-4]
Input: [-2,-2,-5,-4,5,2,0,6,0]
Assertion: expected 2 to equal 1