Nice expression for the usage test. Maybe one can add function "dec2base", cause the return type is a String.
The problem description should mention that dec2base isn't allowed either.
This will fail to detect certain palindromes which contain zero e.g. 10101 however the test suite doesn't (yet) contain any such.
There's something strange with the Cody test suites today...
Check if sorted
Return unique values without sorting
select the primes of a vector
Find nth maximum
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
Test if two numbers have the same digits
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
Recurring Cycle Length (Inspired by Project Euler Problem 26)
ASCII Birthday Cake
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