/in/foo.cc: In function 'int main()':
/in/foo.cc:39:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i=0,x=0;i<ss.size();i++)
      |                         ~^~~~~~~~~~