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".
Determine if input is odd
Check if sorted
Create a Multiplication table matrix...
Create an n-by-n null matrix and fill with ones certain positions
Swap two numbers
Create matrix with Gray code
How many digits are there?
Vector of numbers divisible by 3
Mean and standard deviation of times in string
Return area of square
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