/in/foo.cc: In function 'int main()':
/in/foo.cc:6:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |         for (int i = 0; i < n.size(); i++) {
      |                         ~~^~~~~~~~~~
/in/foo.cc:14:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |         for (int i = 0; i < n.size(); i++) {
      |                         ~~^~~~~~~~~~
/in/foo.cc:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         for (int i = 0; i < n.size(); i++) {
      |                         ~~^~~~~~~~~~
/in/foo.cc:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for (int i = 0; i < n.size(); i++) {
      |                         ~~^~~~~~~~~~
/in/foo.cc:38:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         for (int i = 0; i < n.size(); i++) {
      |                         ~~^~~~~~~~~~