Compilare: main.cpp: In member function 'void Graph::verify()': main.cpp:71:30: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 71 | if(result.size() != M+1) fout<<-1; | ~~~~~~~~~~~~~~^~~~~~ main.cpp:73:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(int i=0;i<result.size()-1;++i) { | ~^~~~~~~~~~~~~~~~