Compilare: main.cpp: In member function 'std::vector<int> Graph::solveBellmanFord()': main.cpp:691:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 691 | if (rez.size() != _nr_vertex + 1) | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:872:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 872 | if (sol.size() != n - 1) | ~~~~~~~~~~~^~~~~~~~