length!! and not "not isempty"... good point!
Distance walked 3D
Back to basics 13 - Input variables
How long is the longest prime diagonal?
Make a run-length companion vector
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Find my secret number
Replicate elements in vectors
What is the scope of variables in Matlab ?
Narcissistic number ?
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