0_0_19485471_13382.cpp: In function 'void add(int, int)':
0_0_19485471_13382.cpp:18:2: error: reference to 'next' is ambiguous
next[cnt]=head[f];
^
0_0_19485471_13382.cpp:8:13: note: candidates are: int next [1050000]
int head[N],next[N*1000],to[1000*N],cnt=0,sg[N],n,m;
^
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_19485471_13382.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_19485471_13382.cpp: In function 'int dfs(int)':
0_0_19485471_13382.cpp:27:28: error: reference to 'next' is ambiguous
for(int i=head[x];i!=-1;i=next[i])
^
0_0_19485471_13382.cpp:8:13: note: candidates are: int next [1050000]
int head[N],next[N*1000],to[1000*N],cnt=0,sg[N],n,m;
^
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_19485471_13382.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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