/in/foo.cc: In function 'bool isSameNecklace(std::string, std::string)':
/in/foo.cc:9:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     if (n != necklace2.length()) {
      |         ~~^~~~~~~~~~~~~~~~~~~~~