Eroare de compilare: user.cpp: In function ‘int buildhash()’: user.cpp:20:9: error: reference to ‘hash’ is ambiguous hash[sol+put2[i]]=1; ^ user.cpp:9:19: note: candidates are: std::bitset<2000001u> hash bitset <maxvalue> 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/bitset:47, 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:25:11: error: reference to ‘hash’ is ambiguous hash[sol+put2[i]]=1; ^ user.cpp:9:19: note: candidates are: std::bitset<2000001u> hash bitset <maxvalue> 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/bitset:47, 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:28:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:38:9: error: reference to ‘hash’ is ambiguous if (hash[i]==0) break; ^ user.cpp:9:19: note: candidates are: std::bitset<2000001u> hash bitset <maxvalue> 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/bitset:47, 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:30:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("string.in","r",stdin); ^ user.cpp:31:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("string.out","w",stdout); ^