/in/foo.cc: In function 'int main()':
/in/foo.cc:10:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for (int i = 0; i < sa.size(); i++)
      |                         ~~^~~~~~~~~~~
/in/foo.cc:13:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |                 for (j = 0; j < sb.size() && i + j < sa.size(); j++)
      |                             ~~^~~~~~~~~~~
/in/foo.cc:13:52: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |                 for (j = 0; j < sb.size() && i + j < sa.size(); j++)
      |                                              ~~~~~~^~~~~~~~~~~
/in/foo.cc:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |                 if (j == sb.size())
      |                     ~~^~~~~~~~~~~~