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View Compilation Error

0_0_16233396_26351.cpp:21:12: error: reference to 'hash' is ambiguous
   int head[hash], next[State], size;
            ^
0_0_16233396_26351.cpp:11:11: note: candidates are: const int hash
 const int hash = 30007;
           ^
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_16233396_26351.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_16233396_26351.cpp: In member function 'void HashMap::Init()':
0_0_16233396_26351.cpp:26:9: error: 'head' was not declared in this scope
  memset(head, -1, sizeof head);
         ^
0_0_16233396_26351.cpp: In member function 'void HashMap::push(ll, ll)':
0_0_16233396_26351.cpp:30:15: error: reference to 'hash' is ambiguous
  int h = st % hash;
               ^
0_0_16233396_26351.cpp:11:11: note: candidates are: const int hash
 const int hash = 30007;
           ^
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_16233396_26351.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_16233396_26351.cpp:32:14: error: 'head' was not declared in this scope
  for(int i = head[h]; i != -1; i = next[i]) {
              ^
0_0_16233396_26351.cpp:41:15: error: 'head' was not declared in this scope
  next[size] = head[h];
               ^


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