Eroare de compilare: user.cpp: In function ‘int insert(int)’: user.cpp:47:10: error: reference to ‘hash’ is ambiguous it = hash[p % Mod]; ^ user.cpp:19:7: note: candidates are: inf** hash inf **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:49:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( (it -> next != NULL) && (it -> val !=p || it -> id != k1)) ^