0_0_27164259_13093.cpp: In function 'void dfs(int, int, int, int)':
0_0_27164259_13093.cpp:19:14: error: reference to 'next' is ambiguous
int tx=x+next[i][0],ty=y+next[i][1];
^
0_0_27164259_13093.cpp:7:5: note: candidates are: int next [4][2]
int next[4][2]={{0,1},{0,-1},{-1,0},{1,0}};
^
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++/istream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
from 0_0_27164259_13093.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_27164259_13093.cpp:20:15: error: 'ty' was not declared in this scope
if(tx>=0&&ty>=0&&tx<m&&ty<n&&!vis1[tx][ty])
^
0_0_27164259_13093.cpp:46:14: error: reference to 'next' is ambiguous
int tx=x+next[i][0],ty=y+next[i][1];
^
0_0_27164259_13093.cpp:7:5: note: candidates are: int next [4][2]
int next[4][2]={{0,1},{0,-1},{-1,0},{1,0}};
^
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++/istream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
from 0_0_27164259_13093.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_27164259_13093.cpp:47:15: error: 'ty' was not declared in this scope
if(tx>=0&&ty>=0&&tx<m&&ty<n&&!vis2[tx][ty])
^
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