If the input is a negative number, generate an error. Otherwise, return the number.
Implement a ROT13 cipher
Sorted highest to lowest?
Number of toolboxes?
Determine if input is a Narcissistic number
Add a row of zeros on top of a matrix
Minimum of each diagonal
Determine which fields have been modified in a structure
Maximum of each diagonal
Convert ColorSpec string to RGB triplet
Number of active Cody players by date
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