Eroare de compilare: user.cpp: In function ‘void back(int)’: user.cpp:12:60: error: reference to ‘hash’ is ambiguous if(h*v[n]==st[0]&&st[0]!=0&&h>=-125000&&h<=125000&&hash[h+125000]==1) ^ user.cpp:6:39: note: candidates are: int hash [250001] int st[6],v[7],l1,l2,mid,vc[7],nr,n,h,hash[250001]; ^ 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/random:41, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:2: /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:42:5: error: reference to ‘hash’ is ambiguous hash[i*i*i+125000]=1; ^ user.cpp:6:39: note: candidates are: int hash [250001] int st[6],v[7],l1,l2,mid,vc[7],nr,n,h,hash[250001]; ^ 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/random:41, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:2: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:29:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eqs.in","r",stdin); ^ user.cpp:30:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eqs.out","w",stdout); ^ user.cpp:31:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&v[1],&v[2],&v[3],&v[4],&v[5]); ^