Compilare: main.cpp: In member function 'bool Graph::is_correct_graph(std::vector<int>)': main.cpp:68:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | if(v>grade.size()) | ~^~~~~~~~~~~~~ main.cpp: In member function 'void Undirected::criticalConnections(std::vector<std::vector<int> >&)': main.cpp:231:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 231 | for(int i = 0; i < connections.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:243:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 243 | for(int i=0;i<output.size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In member function 'void Directed::findCTC()': main.cpp:362:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 362 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp:364:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 364 | for(int j=0;j<sol[i].size();j++) | ~^~~~~~~~~~~~~~