If the input is a negative number, generate an error. Otherwise, return the number.
Sort a list of complex numbers based on far they are from the origin.
Reverse Run-Length Encoder
Find the sum of the elements in the "second" diagonal
Is this triangle right-angled?
Detect circles in images
SET (the card game)
Find similar/related functions
Determine which fields have been modified in a structure
Find the nearest prime number
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