Compilare: user.cpp: In function ‘int main()’: user.cpp:24:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i){ ^ user.cpp:30:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(al_catelea == el.size()-1){ ^ user.cpp:32:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] g << (rez < v.size() ? rez : -1) << '\n'; ^