/in/foo.cc: In function 'int main()':
/in/foo.cc:8:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |   while (t < s.length()) {
      |          ~~^~~~~~~~~~~~
/in/foo.cc:10:22: 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 = t; i < s.length(); i++)
      |                    ~~^~~~~~~~~~~~