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View Compilation Error

0_0_18404809_3380.cpp: In function 'void add_edge(int, int, int)':
0_0_18404809_3380.cpp:14:5: error: reference to 'next' is ambiguous
     next[id] = first[a];
     ^
0_0_18404809_3380.cpp:7:14: note: candidates are: int next [100200100]
 int first[N],next[N*N],link[N][N]={0},vis[N];
              ^
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_18404809_3380.cpp:1:
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_18404809_3380.cpp: In function 'void bfs(int)':
0_0_18404809_3380.cpp:21:37: error: reference to 'next' is ambiguous
     for( int i=first[point];i!=-1;i=next[i] )
                                     ^
0_0_18404809_3380.cpp:7:14: note: candidates are: int next [100200100]
 int first[N],next[N*N],link[N][N]={0},vis[N];
              ^
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_18404809_3380.cpp:1:
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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