Really fun problem, but the test case is totally wrong. :-(
glad you liked the problem, but the test case is correct just obfuscated.
Vectorize the digits of an Integer
subtract central cross
length of a vector
Matlab Basics II - squares
remove nans fast
Convert a Cell Array into an Array
Magic Concentric Circles
Convert vector datasets to plot with imagesc instead of scatter
is the number happy?
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