"cat" is a really nice touch for concatenation of those arrays! your solutions never fail my expectation.
by the way, i saw that "sub-func" comment...:)
Calling the two sub-functions the right way will not hurt your score. Great work though. :)
Distance walked 2D
Create a vector whose elements depend on the previous element
Area of an Isoceles Triangle
Vertical matrix sort
Capitilize the first letter of every word in a string
Remove the air bubbles from a vector
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