Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:191:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) ^ user.cpp:207:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s.size(); j++) ^ user.cpp:213:9: error: reference to ‘hash’ is ambiguous hash.push_back(p); ^ user.cpp:170:27: note: candidates are: std::vector<std::pair<int, int> > hash vector <pair <int, int> > 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/ostream:38, from /usr/include/c++/4.8/iostream:39, 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:248:21: error: reference to ‘hash’ is ambiguous if (p == hash[ind - 1]) ^ user.cpp:170:27: note: candidates are: std::vector<std::pair<int, int> > hash vector <pair <int, int> > 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/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^