Solutions to light problems like this enable scaling up ideas to heavy, complex algorithms.
Swap the input arguments
Basics: 'Find the eigenvalues of given matrix
Is the input divisible by 3?
Back to basics - mean of corner elements of a matrix
Spot the First Occurrence of 5
How Many Months Until It's Today Again?
Make a run-length companion vector
Twins in a Window
Give a matrix that matches itself when rotated
How long is the longest prime diagonal?
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