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View Compilation Error

0_0_17549126_12845.cpp: In function 'void bfs(int, int, int&, int&, int&)':
0_0_17549126_12845.cpp:31:24: error: reference to 'next' is ambiguous
             int tx=r.x+next[i][0];
                        ^
0_0_17549126_12845.cpp:6:20: note: candidates are: int next [4][2]
 int book[301][301],next[4][2]={{-1,0},{0,-1},{1,0},{0,1}};
                    ^
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_17549126_12845.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_17549126_12845.cpp:32:24: error: reference to 'next' is ambiguous
             int ty=r.y+next[i][1];
                        ^
0_0_17549126_12845.cpp:6:20: note: candidates are: int next [4][2]
 int book[301][301],next[4][2]={{-1,0},{0,-1},{1,0},{0,1}};
                    ^
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_17549126_12845.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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