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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.
This line on your solution is wrong:
if (arr[i + 1] > arr[i - 1] && arr[i - 1])It's executed when
iis 0, causing out of bounds access witharr[i - 1].your solution is incorrect, it's not a kata issue.