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View Compilation Error

0_0_13756372_13869.cpp: In function 'int main()':
0_0_13756372_13869.cpp:28:13: error: reference to 'hash' is ambiguous
         mem(hash,-1);
             ^
0_0_13756372_13869.cpp:14:25: note: in definition of macro 'mem'
 #define mem(a,b) memset(a,b,sizeof(a))
                         ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_13756372_13869.cpp:28:13: error: reference to 'hash' is ambiguous
         mem(hash,-1);
             ^
0_0_13756372_13869.cpp:14:36: note: in definition of macro 'mem'
 #define mem(a,b) memset(a,b,sizeof(a))
                                    ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_13756372_13869.cpp:31:16: error: reference to 'hash' is ambiguous
             if(hash[i]>=0) continue;
                ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_13756372_13869.cpp:40:13: error: reference to 'hash' is ambiguous
             hash[num]=i;
             ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_13756372_13869.cpp:41:13: error: reference to 'hash' is ambiguous
             hash[i]=num;
             ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_13756372_13869.cpp:43:21: error: reference to 'hash' is ambiguous
         printf("%d",hash[a[0]]);
                     ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^
0_0_13756372_13869.cpp:45:22: error: reference to 'hash' is ambiguous
         printf(" %d",hash[a[i]]);
                      ^
0_0_13756372_13869.cpp:19:19: note: candidates are: int hash [100005]
 int n,a[100005],i,hash[100005];
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_bvector.h:1181:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:65,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:61,
                 from 0_0_13756372_13869.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/functional_hash.h:58:12: note:                 template<class _Tp> struct std::hash
     struct hash;
            ^


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