Compilare: user.cpp: In function ‘void Clear()’: user.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i <= aux.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0;j < aux.size();j++) ^ user.cpp:61:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0;j < aux.size();j++) ^