Compilare: user.cpp:14:1: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘void print_edges(VECTOR_OF_EDGES&)’: user.cpp:27:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<E.size();i++) ^ user.cpp: In function ‘void print_nodes(VECTOR_OF_INTS&)’: user.cpp:35:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<V.size();i++) ^