The description does not explicitly mention that the only allowed digits are 0 and 1. This is implied by the word binary, but it woul be clearerin my opinion.

Lua translation

Haskell translation

Approved

Scala translation

Python fork with random tests and test grouping

D translation

thank you bro, don't get description of this kata at all) Can you add this link to kata's details?

approved

It's ok in the current version.

COBOL translation (author is inactive).

In c++ they forget to put a ";" at the end of the class initialization. It must be:

#include <string>

class Negabinary{
public:
  static std::string ToNegabinary(int i);
  static int ToInt(std::string s); 
};

This is the only case that I cannot understand and tried to recognize which forgotten ";" there in class initialization. So please fix it.

Giving examples doesn't mean there is no need to define what a negabinary system is.

https://en.wikipedia.org/wiki/Negative_base