Compilare: user.cpp:86:2: warning: no newline at end of file user.cpp: In function 'std::vector<std::pair<double, double>, std::allocator<std::pair<double, double> > > convexHull(std::vector<std::pair<double, double>, std::allocator<std::pair<double, double> > >&)': user.cpp:35: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void printPoints(std::vector<std::pair<double, double>, std::allocator<std::pair<double, double> > >&, std::string)': user.cpp:75: warning: comparison between signed and unsigned integer expressions