Distance walked 1D
Number of Horns on a unicorn!
Insert zeros into vector
Speed of car
Swap the first and last columns (★★)
Mo money, mo math #2! (★★★)
Vector raised to a power, element-wise (★)
Get the elements of diagonal and antidiagonal for any m-by-n matrix (★★★★)
Magnitude of a vector (★★★)
Extract leading non-zero digit (★★★★★)
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