Compilare: main.cpp: In member function 'void graf::afisare_lista()': main.cpp:83:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(auto j=0 ; j<lista[i].size(); j++) | ~^~~~~~~~~~~~~~~~ main.cpp: In member function 'void graf::afisare_muchii()': main.cpp:90:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | for(auto i=0 ; i<muchii.size(); i++) | ~^~~~~~~~~~~~~~