This should not work in general. It returns false-positive for consecutive 1 5 7 :-)
This should not work, but test suite only requires us to check for groups of three in columns.
Thanks for noticing that...I'll edit the test suite and fix that.
Swap the first and last columns
Is my wife right?
intersection of matrices
Swap two numbers
Piecewise linear interpolation
Return elements unique to either input
Matrix of Multiplication Facts
I've got the power! (Inspired by Project Euler problem 29)
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