Compilare: main.cpp: In function 'std::vector<int> toposort(const Graph&)': main.cpp:19:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i = 1; i < g.size(); i++) | ~~^~~~~~~~~~ main.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int node = 1; node < g.size(); node++) | ~~~~~^~~~~~~~~~