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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.
Made mine similar way, but could someone explain me, why don't we need to check after line 4 if sum == 0?
I mean on line 6: for example, sum from arr{1, -1, 5, -5} == 0, so
cSum(is 0) != sum(is 0) - arr[0](is 1).
How will it return 0?