You really need to supply more test cases if you want to go far in software engineering...
This is just lame, and without a proper test case.
Terrible test set.
like a joke
Return the largest number that is adjacent to a zero
Prime factor digits
Increment a number, given its digits
Project Euler: Problem 1, Multiples of 3 and 5
Area of a triangle
Get the length of a given vector
Rotate a Matrix
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