/in/foo.cc: In function 'int main()':
/in/foo.cc:9:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |   for(int i=0;i<str1.size();i++){
      |               ~^~~~~~~~~~~~
/in/foo.cc:11:18: 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<str2.size();j++){
      |                 ~^~~~~~~~~~~~