Compilare: main.cpp: In member function 'std::vector<int> Graph::getTopologicalSort()': main.cpp:145:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'const int' [-Wsign-compare] 145 | return result.size() == N_NODES ? result : std::vector<int>(); // if cycle => empty | ~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:284:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 284 | for (int i = 2; i <= res.second.size() - 1; ++i) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~