Eroare de compilare: user.cpp: In member function ‘int Hash::search(int)’: user.cpp:28:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[index].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:70:21: error: reference to ‘hash’ is ambiguous case 1: hash.insert(x); break; ^ user.cpp:54:6: note: candidates are: Hash hash Hash hash; ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:3033:0, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:71:21: error: reference to ‘hash’ is ambiguous case 2: hash.remove(x); break; ^ user.cpp:54:6: note: candidates are: Hash hash Hash hash; ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:3033:0, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:72:29: error: reference to ‘hash’ is ambiguous case 3: out << (hash.search(x) != -1) << '\n'; ^ user.cpp:54:6: note: candidates are: Hash hash Hash hash; ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:3033:0, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42,