Compilare: user.cpp: In function ‘void showmaxi(std::deque<int>)’: user.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<d.size();++i) ^ user.cpp: In function ‘void showmini(std::deque<int>)’: user.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<d.size();++i) ^