Compilare: user.cpp: In function ‘void inmultire(std::vector<int>&, int)’: user.cpp:26:16: 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:40:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=x.size()) ^ user.cpp:42:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=y.size()) ^