Compilare: main.cpp: In member function 'int Graph::dfs(int, int&)': main.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i = 0; i < edges_[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graph::printCtc(std::ostream&)': main.cpp:84:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for (int i = 0; i < ctc_.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:85:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for (int j = 0; j < ctc_[i].size(); j++) { | ~~^~~~~~~~~~~~~~~~