/in/foo.cc: In function 'std::vector<std::__cxx11::basic_string<char> > PathChange(std::__cxx11::string)':
/in/foo.cc:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=1;j<path.length();j++)
                     ~^~~~~~~~~~~~~~
/in/foo.cc:17:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
          for(;j<path.length();j++) 
               ~^~~~~~~~~~~~~~
/in/foo.cc:28:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int j=0;j<path.length();j++)
                  ~^~~~~~~~~~~~~~
/in/foo.cc:31:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(;j<path.length();j++)
              ~^~~~~~~~~~~~~~