Compilare: main.cpp: In function 'std::vector<std::pair<double, double> > infas(std::vector<std::pair<double, double> >)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<v.size();i++) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<pts.size();i++) ~^~~~~~~~~~~ main.cpp:62:9: warning: 'sjpos' may be used uninitialized in this function [-Wmaybe-uninitialized] if(i>sjpos) pts[i-1]=pts[i]; ^~