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.
Back to basics 4 - Search Path
Sum the elements in either diagonal of a square matrix
Generate a random matrix A of (1,-1)
Find the nearest integer
Determine the square root
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