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View Compilation Error

0_0_14273684_9815.cpp: In function 'unsigned int findtree(int, int, int)':
0_0_14273684_9815.cpp:106:9: error: reference to 'hash' is ambiguous
         hash=hash*a[n].seed+a[n].data;
         ^
0_0_14273684_9815.cpp:100:14: note: candidates are: unsigned int hash
 unsigned int hash;
              ^
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_14273684_9815.cpp:5:
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_14273684_9815.cpp:106:14: error: reference to 'hash' is ambiguous
         hash=hash*a[n].seed+a[n].data;
              ^
0_0_14273684_9815.cpp:100:14: note: candidates are: unsigned int hash
 unsigned int hash;
              ^
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_14273684_9815.cpp:5:
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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