0_0_36303116_8724.cpp: In function 'void bfs(int, int, int)':
0_0_36303116_8724.cpp:48:18: error: reference to 'next' is ambiguous
tail.x=head.x+next[i][0];
^
0_0_36303116_8724.cpp:7:5: note: candidates are: int next [4][2]
int next[4][2]={0,1,0,-1,1,0,-1,0},book[3][20][20];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_36303116_8724.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_36303116_8724.cpp:49:18: error: reference to 'next' is ambiguous
tail.y=head.y+next[i][1];
^
0_0_36303116_8724.cpp:7:5: note: candidates are: int next [4][2]
int next[4][2]={0,1,0,-1,1,0,-1,0},book[3][20][20];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_36303116_8724.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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