0_0_27427980_30770.cpp: In function 'void dfs1(int, int, int)':
0_0_27427980_30770.cpp:18:21: error: reference to 'next' is ambiguous
int x = i + next[k][0],y = j + next[k][1];
^
0_0_27427980_30770.cpp:5:5: note: candidates are: int next [4][2]
int next[4][2]={{-1,0},{0,-1},{0,1},{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++/ostream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
from 0_0_27427980_30770.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_27427980_30770.cpp:19:20: error: 'y' was not declared in this scope
if (x<1 || y<1 || x>n || y>m)
^
0_0_27427980_30770.cpp:21:18: error: 'y' was not declared in this scope
if (s[x][y] == g[step])
^
0_0_27427980_30770.cpp: In function 'void dfs2(int, int, int)':
0_0_27427980_30770.cpp:34:21: error: reference to 'next' is ambiguous
int x = i + next[k][0], y = j + next[k][1];
^
0_0_27427980_30770.cpp:5:5: note: candidates are: int next [4][2]
int next[4][2]={{-1,0},{0,-1},{0,1},{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++/ostream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
from 0_0_27427980_30770.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_27427980_30770.cpp:35:20: error: 'y' was not declared in this scope
if (x<1 || y<1 || x>n || y>m)
^
0_0_27427980_30770.cpp:37:18: error: 'y' was not declared in this scope
if (s[x][y] == c[step])
^
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