foo.cc: In function 'int main()':
foo.cc:13:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     while (i < s.length() && j < t.length()) {
      |            ~~^~~~~~~~~~~~
foo.cc:13:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     while (i < s.length() && j < t.length()) {
      |                              ~~^~~~~~~~~~~~
foo.cc:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if (j == t.length()) {
      |             ~~^~~~~~~~~~~~~

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