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View Compilation Error

0_0_20313127_28855.cpp: In function 'void dfs2(int)':
0_0_20313127_28855.cpp:43:2: error: reference to 'hash' is ambiguous
  hash[x]=d[x]*seed1;
  ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp:56:9: error: reference to 'hash' is ambiguous
    sum+=hash[to];
         ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp:58:2: error: reference to 'hash' is ambiguous
  hash[x]=hash[x]+sum*seed2;
  ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp:58:10: error: reference to 'hash' is ambiguous
  hash[x]=hash[x]+sum*seed2;
          ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp:59:2: error: reference to 'hash' is ambiguous
  hash[x]*=hash[x];
  ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp:59:11: error: reference to 'hash' is ambiguous
  hash[x]*=hash[x];
           ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp: In function 'int main()':
0_0_20313127_28855.cpp:84:8: error: reference to 'hash' is ambiguous
   last=hash[1];
        ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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_20313127_28855.cpp:102:6: error: reference to 'hash' is ambiguous
   if(hash[1]==last)
      ^
0_0_20313127_28855.cpp:13:4: note: candidates are: ll hash [3005]
 ll hash[3005];
    ^
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_20313127_28855.cpp:3:
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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