Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:31:23: error: ‘std::set<std::pair<int, int> >::iterator’ has no member named ‘second’ nod=h.begin().second; ^ user.cpp:33:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<vec[nod].size();k++) ^ user.cpp:35:25: error: ‘class std::vector<std::pair<int, int> >’ has no member named ‘first’ to=vec[nod].first; ^ user.cpp:36:27: error: ‘class std::vector<std::pair<int, int> >’ has no member named ‘second’ cost=vec[nod].second; ^