/in/foo.cc: In function 'int main()':
/in/foo.cc:12:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |                 if (pos < 0 || pos >= s.size()) break;
      |                                ~~~~^~~~~~~~~~~
/in/foo.cc:17:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |                 for (int i = pos + k; i < s.length(); ++i)
      |                                       ~~^~~~~~~~~~~~