/in/foo.cc: In function 'std::__cxx11::string standard(std::__cxx11::string)':
/in/foo.cc:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (dot == 0 || dot == s.length() - 1)
                  ~~~~^~~~~~~~~~~~~~~~~
/in/foo.cc:21:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (count(s.begin(), s.end(), '0') == s.length())
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~