I took complements of the test case polar angles in order to agree with customary definitions of polar angle.
I agree. Polar angles are, by convention, measured from the pole, but in this problem you have to consider them to be measure from the equator if you wish to agree with the test cases.
Maximum running product for a string of numbers
Project Euler: Problem 4, Palindromic numbers
Twins in a Window
Rotate a Matrix by 90 degrees
Make a run-length companion vector
Roll the Dice!
Determine if a Given Number is a Triangle Number
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
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