Eroare de compilare: user.cpp: In function ‘int exists(int)’: user.cpp:16:37: error: reference to ‘hash’ is ambiguous for(vector<int>:: iterator it = hash[key].begin(); it != hash[key].end(); it++) ^ user.cpp:9:14: note: candidates are: std::vector<int> hash [1000] vector <int> hash[1000]; ^ In file included from /usr/include/c++/4.8/bits/stl_bvector.h:1134:0, from /usr/include/c++/4.8/vector:65, from user.cpp:3: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:16:62: error: reference to ‘hash’ is ambiguous for(vector<int>:: iterator it = hash[key].begin(); it != hash[key].end(); it++) ^ user.cpp:9:14: note: candidates are: std::vector<int> hash [1000] vector <int> hash[1000]; ^ In file included from /usr/include/c++/4.8/bits/stl_bvector.h:1134:0, from /usr/include/c++/4.8/vector:65, from user.cpp:3: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp: In function ‘int main()’: user.cpp:40:13: error: reference to ‘hash’ is ambiguous hash[hash_value % MOD].push_back(hash_value); ^ user.cpp:9:14: note: candidates are: std::vector<int> hash [1000] vector <int> hash[1000]; ^ In file included from /usr/include/c++/4.8/bits/stl_bvector.h:1134:0, from /usr/include/c++/4.8/vector:65, from user.cpp:3: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:26:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.in", "r", stdin); ^ user.cpp:27:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.out", "w", stdout); ^ user.cpp:31:29: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(text, Nmax, stdin); ^