Sorry, I'm not very familiar with the UI yet, it's good to know 63 other people finished it.

It could be a problem with my code, however everything works fine when running the tests, it's only when submitting that it fails.
The following does not compile either when submitting, so I assume it must be a recent problem with the site.

std::string correct(std::string timeString)
{ 
  return "";
}

Welp. I can pass the tests without problem, but when I submit (even an empty function), I get a compile error from the backend:

-isystem /runner/frameworks/cpp fatal error: 'boost/algorithm/string.hpp' file not found
#include <boost/algorithm/string.hpp>

I didn't include it, so it must have been added silently.
Is this something to do with this kata in particular, or is the backend buggy? :/