very cool question: learn some new tricks, and get 10 points, why not?!
Hint to spare the pain : string(NaN)==
Extract leading non-zero digit
Implement a ROT13 cipher
Find nth maximum
MATLAB Basic: rounding IV
Apply Function to Each Field of a Structure Array: Part 1
Hankelize a matrix
Integer complexity (Large numbers)
Group-wise Euclidean distance
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