Need a test case with a 0 on the chosen diagonal.
Agree with Jon's comment that the matrix should contain 0 elements
so simple that it never occurred to me
Remove the polynomials that have positive real elements of their roots.
Rotate a Matrix by 90 degrees
Permute diagonal and antidiagonal
Find the 9's Complement
Mirror, mirror on the wall, who is fairest of them all?
BLOCK x3 (Version 4)
Decrypt the cypher using XOR encryption (for beginners)
Rank of magic square (for beginners)
Find files with extension ext in the current directory
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