foo.cc: In function ‘bool isSimilar(std::string, std::string)’:
foo.cc:24:34: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   24 |                         while (i < shorter.size() && j < longer.size())
      |                                ~~^~~~~~~~~~~~~~~~
foo.cc:24:56: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   24 |                         while (i < shorter.size() && j < longer.size())
      |                                                      ~~^~~~~~~~~~~~~~~