Eroare de compilare: main.cpp: In function 'int main()': main.cpp:23:7: error: reference to 'hash' is ambiguous hash.insert(x); ^~~~ main.cpp:7:20: note: candidates are: std::unordered_set<int> hash unordered_set<int> hash; ^~~~ In file included from /usr/include/c++/6/bits/basic_string.h:5646:0, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^~~~ main.cpp:27:7: error: reference to 'hash' is ambiguous hash.erase(x); ^~~~ main.cpp:7:20: note: candidates are: std::unordered_set<int> hash unordered_set<int> hash; ^~~~ In file included from /usr/include/c++/6/bits/basic_string.h:5646:0, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^~~~ main.cpp:30:14: error: reference to 'hash' is ambiguous fout << (hash.find(x) != hash.end()) << "\n"; ^~~~ main.cpp:7:20: note: candidates are: std::unordered_set<int> hash unordered_set<int> hash; ^~~~ In file included from /usr/include/c++/6/bits/basic_string.h:5646:0, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash Non zero exit status: 1