/in/foo.cc:25:12: error: ISO C++ forbids declaration of 'out' with no type [-fpermissive]
 inline out(){
            ^
/in/foo.cc: In function 'int out()':
/in/foo.cc:27:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(register int j=0;j<G[i].size();++j)
                        ~^~~~~~~~~~~~
/in/foo.cc:30:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(register int i=0;i<G[x].size();++i){
                        ~^~~~~~~~~~~~