Compilare: user.cpp: In function ‘void inmultire(std::vector<int>&, int)’: user.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=x.size()) ^ user.cpp: In function ‘void scadere(std::vector<int>&, std::vector<int>)’: user.cpp:43:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=x.size()) ^ user.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=y.size()) ^ user.cpp: In function ‘int main()’: user.cpp:85:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i<=n.size(); i++) ^ user.cpp:86:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j<=c.size(); j++) ^