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View Compilation Error

0_0_13710753_5311.cpp: In function 'void init()':
0_0_13710753_5311.cpp:21:6: error: reference to 'next' is ambiguous
  CLR(next,-1);
      ^
0_0_13710753_5311.cpp:4:28: note: in definition of macro 'CLR'
 #define CLR(x,val) memset((x),(val),sizeof(x))
                            ^
0_0_13710753_5311.cpp:11:5: note: candidates are: int next [2005]
 int next[MAXN];
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:61,
                 from 0_0_13710753_5311.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note:                 template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
     next(_ForwardIterator __x, typename
     ^
0_0_13710753_5311.cpp:21:6: error: reference to 'next' is ambiguous
  CLR(next,-1);
      ^
0_0_13710753_5311.cpp:4:44: note: in definition of macro 'CLR'
 #define CLR(x,val) memset((x),(val),sizeof(x))
                                            ^
0_0_13710753_5311.cpp:11:5: note: candidates are: int next [2005]
 int next[MAXN];
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:61,
                 from 0_0_13710753_5311.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note:                 template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
     next(_ForwardIterator __x, typename
     ^
0_0_13710753_5311.cpp: In function 'void addEdge(int, int, int)':
0_0_13710753_5311.cpp:26:26: error: reference to 'next' is ambiguous
  to[epos]=v, w[epos]=wg, next[epos]=head[u], head[u]=epos++;
                          ^
0_0_13710753_5311.cpp:11:5: note: candidates are: int next [2005]
 int next[MAXN];
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:61,
                 from 0_0_13710753_5311.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note:                 template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
     next(_ForwardIterator __x, typename
     ^
0_0_13710753_5311.cpp:27:26: error: reference to 'next' is ambiguous
  to[epos]=u, w[epos]=wg, next[epos]=head[v], head[v]=epos++; 
                          ^
0_0_13710753_5311.cpp:11:5: note: candidates are: int next [2005]
 int next[MAXN];
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:61,
                 from 0_0_13710753_5311.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note:                 template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
     next(_ForwardIterator __x, typename
     ^
0_0_13710753_5311.cpp: In function 'void dfs(int, int)':
0_0_13710753_5311.cpp:31:25: error: reference to 'next' is ambiguous
  for(int e=head[u];~e;e=next[e]){
                         ^
0_0_13710753_5311.cpp:11:5: note: candidates are: int next [2005]
 int next[MAXN];
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:61,
                 from 0_0_13710753_5311.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note:                 template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
     next(_ForwardIterator __x, typename
     ^


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