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View Compilation Error

0_0_21376162_7764.cpp: In function 'int main()':
0_0_21376162_7764.cpp:10:58: error: reference to 'hash' is ambiguous
         for (i=1;i<=n;++i)for (j=1;j<=m;++j)scanf("%ld",&hash[i][j]);
                                                          ^
0_0_21376162_7764.cpp:5:6: note: candidates are: long int hash [12][12]
 long hash[12][12],T,b=1,i,j,k,n,m,lim,len,p,q;
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:3068:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_21376162_7764.cpp:1:
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_21376162_7764.cpp:16:37: error: reference to 'hash' is ambiguous
                     if (x=p&k,y=q&k,hash[i][j])
                                     ^
0_0_21376162_7764.cpp:5:6: note: candidates are: long int hash [12][12]
 long hash[12][12],T,b=1,i,j,k,n,m,lim,len,p,q;
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:3068:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_21376162_7764.cpp:1:
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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