Compilare: main.cpp: In member function 'virtual long long int OrientedGraph::getCconexe()': main.cpp:67:45: warning: no return statement in function returning non-void [-Wreturn-type] 67 | virtual long long getCconexe() override{} | ^ main.cpp: In function 'int main()': main.cpp:143:5: warning: deleting object of abstract class type 'Graph' which has non-virtual destructor will cause undefined behavior [-Wdelete-non-virtual-dtor] 143 | delete g; | ^~~~~~~~ main.cpp:137:15: warning: unused variable 'S' [-Wunused-variable] 137 | int N, M, S; | ^