0_0_29334213_25636.cpp: In function 'void dfs(int, int, long long int)':
0_0_29334213_25636.cpp:31:18: error: reference to 'next' is ambiguous
int tx=x+next[i][0],ty=y+next[i][1];
^
0_0_29334213_25636.cpp:5:28: note: candidates are: int next [4][2]
int a[55][55],book[55][55],next[4][2]={{1,0},{-1,0},{0,1},{0,-1}},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++/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_29334213_25636.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_29334213_25636.cpp:32:21: error: 'ty' was not declared in this scope
if(book[tx][ty]||tx<0||ty<0||tx>=n||ty>=n)
^
0_0_29334213_25636.cpp:34:18: error: 'ty' was not declared in this scope
book[tx][ty]=1;
^
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