Eroare de compilare: user.cpp:49:1: error: reference to ‘hash’ is ambiguous hash mp; ^ user.cpp:18:8: note: candidates are: struct hash struct 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:49:1: error: ‘hash’ does not name a type hash mp; ^ user.cpp: In function ‘void dfs(int)’: user.cpp:54:9: error: ‘mp’ was not declared in this scope ans += mp.wh(vl-s); ^ user.cpp: In function ‘int main()’: user.cpp:68:5: error: ‘mp’ was not declared in this scope mp.add(0,1); ^