The problem says the input is a positive integer but the first test inputs 0. In my code that caused r = 0/0 error. Please change the wording to "input is non-negative".
Back to basics 15 - classes
Find the next Fibonacci number
Convert radians to degrees
How many digits are there?
Volume and area of a sphere
Create matrix with Gray code
Vector of numbers divisible by 3
Number of odd and even elements within matrix
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