I think that there is an error on test case numbe 1. http://en.wikipedia.org/wiki/Cofactor_(linear_algebra)
Please correct test case 1.
I believe the answer here should be -3, not 6.
Flag largest magnitude swings as they occur
Multiply 2 numbers
Change the sign of even index entries of the reversed vector
The sum of the numbers in the vector
Create incrementing array
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