0_0_16741266_21417.cpp: In function 'void add(int, int)':
0_0_16741266_21417.cpp:15:2: error: reference to 'next' is ambiguous
next[++ed]=head[a],head[a]=ed,zhi[ed]=b;
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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_16741266_21417.cpp:16:2: error: reference to 'next' is ambiguous
next[++ed]=head[b],head[b]=ed,zhi[ed]=a;
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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_16741266_21417.cpp: In function 'void dfs(int)':
0_0_16741266_21417.cpp:21:24: error: reference to 'next' is ambiguous
for(int i=head[x];i;i=next[i])if(zhi[i]!=fa[x])
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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_16741266_21417.cpp: In function 'void dfsxxx(int, int)':
0_0_16741266_21417.cpp:38:24: error: reference to 'next' is ambiguous
for(int i=head[x];i;i=next[i])if(zhi[i]!=fa[x])
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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_16741266_21417.cpp: In function 'void dfs2(int)':
0_0_16741266_21417.cpp:48:24: error: reference to 'next' is ambiguous
for(int i=head[x];i;i=next[i])if(zhi[i]!=fa[x])
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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_16741266_21417.cpp: In function 'void dfs3(int)':
0_0_16741266_21417.cpp:54:24: error: reference to 'next' is ambiguous
for(int i=head[x];i;i=next[i])if(zhi[i]!=fa[x])
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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_16741266_21417.cpp: In function 'int main()':
0_0_16741266_21417.cpp:77:25: error: reference to 'next' is ambiguous
for(int i=head[1];i;i=next[i])
^
0_0_16741266_21417.cpp:11:19: note: candidates are: int next [2000020]
int n,m,head[xxx],next[xxx<<1],zhi[xxx<<1],fa[xxx],ed;
^
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_16741266_21417.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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