Compilare: user.cpp: In function ‘void make_pseudo_gray(int, std::vector<int>&)’: user.cpp:30:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < fact.size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:49:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < rez.size(); ++i){ ^