Compilare: user.cpp: In member function ‘std::vector<double> Retea::Cost(std::vector<std::pair<double, double> >, std::vector<std::pair<double, double> >)’: user.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < B.size(); ++i) ^ user.cpp:34:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < C.size(); ++j) { ^ user.cpp: In member function ‘double Retea::Get_Min_Cost(std::vector<double>, std::vector<std::pair<double, double> >)’: user.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < B.size(); ++i) ^ user.cpp:45:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < B.size(); ++j) ^ user.cpp:49:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < B.size(); ++i) Cost += D[i]; ^