Compilare: user.cpp:16:1: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘int main()’: user.cpp:51:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<v.size();i++) ^ user.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ^