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View Compilation Error

0_0_17299052_20007.cpp: In function 'void chu()':
0_0_17299052_20007.cpp:37:12: error: reference to 'hash' is ambiguous
     memset(hash,0,sizeof(hash));
            ^
0_0_17299052_20007.cpp:28:17: note: candidates are: int hash [310000]
 int val[310000],hash[310000],n;
                 ^
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_17299052_20007.cpp:2:
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_17299052_20007.cpp:37:26: error: reference to 'hash' is ambiguous
     memset(hash,0,sizeof(hash));
                          ^
0_0_17299052_20007.cpp:28:17: note: candidates are: int hash [310000]
 int val[310000],hash[310000],n;
                 ^
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_17299052_20007.cpp:2:
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_17299052_20007.cpp: In function 'void dfs(int, int, int)':
0_0_17299052_20007.cpp:65:17: error: reference to 'hash' is ambiguous
         if(1 == hash[son])
                 ^
0_0_17299052_20007.cpp:28:17: note: candidates are: int hash [310000]
 int val[310000],hash[310000],n;
                 ^
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_17299052_20007.cpp:2:
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_17299052_20007.cpp:67:9: error: reference to 'hash' is ambiguous
         hash[son]=1;
         ^
0_0_17299052_20007.cpp:28:17: note: candidates are: int hash [310000]
 int val[310000],hash[310000],n;
                 ^
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_17299052_20007.cpp:2:
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_17299052_20007.cpp: In function 'int main()':
0_0_17299052_20007.cpp:126:9: error: reference to 'hash' is ambiguous
         hash[1]=1;
         ^
0_0_17299052_20007.cpp:28:17: note: candidates are: int hash [310000]
 int val[310000],hash[310000],n;
                 ^
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_17299052_20007.cpp:2:
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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