Compilare: main.cpp: In function 'std::vector<int> bellman_ford(std::vector<std::vector<std::pair<int, int> > >&, int)': main.cpp:38:44: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<std::vector<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if (nr_of_visits[node] == list.size()) { //cycle main.cpp: In function 'int main()': main.cpp:67:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (int i = 2; i < dist.size(); i++) { | ~~^~~~~~~~~~~~~