/in/foo.cc: In function 'void Get_Shift(std::__cxx11::string)':
/in/foo.cc:24:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 1;i<a.size();i++)
                ~^~~~~~~~~
/in/foo.cc: In function 'void Kmp(std::__cxx11::string, std::__cxx11::string)':
/in/foo.cc:34:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0;i<a.size();i++)
                ~^~~~~~~~~
/in/foo.cc:38:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(j==b.size()-1)
      ~^~~~~~~~~~~~