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View Compilation Error

0_0_14222224_19691.cpp: In function 'int dfs(int)':
0_0_14222224_19691.cpp:16:3: error: reference to 'hash' is ambiguous
   hash[root] = ans;
   ^
0_0_14222224_19691.cpp:6:5: note: candidates are: int hash [105]
 int hash[105];
     ^
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 0_0_14222224_19691.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_14222224_19691.cpp:21:3: error: reference to 'hash' is ambiguous
   hash[root] = 0;
   ^
0_0_14222224_19691.cpp:6:5: note: candidates are: int hash [105]
 int hash[105];
     ^
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 0_0_14222224_19691.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_14222224_19691.cpp: In function 'int solve()':
0_0_14222224_19691.cpp:29:7: error: reference to 'hash' is ambiguous
   if( hash[i]==K ) ans++;
       ^
0_0_14222224_19691.cpp:6:5: note: candidates are: int hash [105]
 int hash[105];
     ^
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 0_0_14222224_19691.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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