Eroare de compilare: user.cpp: In function ‘int buildhash()’: user.cpp:18:9: error: reference to ‘hash’ is ambiguous hash[sol+put2[i]]=1; ^ user.cpp:7:20: note: candidates are: int hash [2000001] int n,k,put2[18],i,hash[maxvalue]; ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:3033:0, from /usr/include/c++/4.8/string:52, 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:23:11: error: reference to ‘hash’ is ambiguous hash[sol+put2[i]]=1; ^ user.cpp:7:20: note: candidates are: int hash [2000001] int n,k,put2[18],i,hash[maxvalue]; ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:3033:0, from /usr/include/c++/4.8/string:52, 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:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:36:9: error: reference to ‘hash’ is ambiguous if (hash[i]==0) break; ^ user.cpp:7:20: note: candidates are: int hash [2000001] int n,k,put2[18],i,hash[maxvalue]; ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:3033:0, from /usr/include/c++/4.8/string:52, 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:28:31: 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:29:33: 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); ^ user.cpp:30:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^