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View Compilation Error

0_0_17301587_19387.cpp: In function 'void addedge(int, int)':
0_0_17301587_19387.cpp:24:18: error: reference to 'next' is ambiguous
  num++;to[num]=y;next[num]=head[x];head[x]=num;
                  ^
0_0_17301587_19387.cpp:14:22: note: candidates are: int next [310]
 int head[16],to[310],next[310];
                      ^
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++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 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_17301587_19387.cpp:5:
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_17301587_19387.cpp: In function 'int main()':
0_0_17301587_19387.cpp:69:32: error: reference to 'next' is ambiguous
         for (int p=head[i];p;p=next[p]) if (S&(1<<(to[p]-1))) num++;
                                ^
0_0_17301587_19387.cpp:14:22: note: candidates are: int next [310]
 int head[16],to[310],next[310];
                      ^
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++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 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_17301587_19387.cpp:5:
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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