Compilare: user.cpp: In function ‘void ConvexHull(std::pair<int, std::pair<int, int> >*)’: user.cpp:58:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Border.size(); ++ i) printf("%i ", Border[i]); ^ user.cpp:59:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Inside.size(); ++ i) printf("%i ", Inside[i]); ^