/in/foo.cc: In function 'int main()':
/in/foo.cc:11:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |                         for(int j=0;j<s.size();j++){
      |                                     ~^~~~~~~~~
/in/foo.cc:13:54: 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(int l=0;l<s.size();l++){
      |                                                     ~^~~~~~~~~