Compilare: main.cpp: In member function 'void Graph::printlistOfNeighbours(std::ostream&)': main.cpp:68:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for (int i = 1; i < this->listOfNeighbours.size() - 1; i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:71:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for (int j = 0; j < listOfNeighbours[i].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~