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".
Extract leading non-zero digit
Implement a ROT13 cipher
Number of 1s in the Binary Representation of a Number
03 - Matrix Variables 6
Mean and standard deviation of times in string
Make a vector of prime numbers
How many digits are there?
Return area of square
Volume and area of a sphere
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