0_0_13130403_19203.cpp: In function 'void add(int, int)':
0_0_13130403_19203.cpp:16:17: error: reference to 'next' is ambiguous
v[++num]=y;next[num]=head[x];head[x]=num;
^
0_0_13130403_19203.cpp:14:38: note: candidates are: int next [62000]
int n,T,fa[N][lg],num,head[N],v[N*2],next[N*2],nn,dep[N],Fa[N],st[N*2],ed[N*2];
^
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_13130403_19203.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_13130403_19203.cpp: In function 'void build(int)':
0_0_13130403_19203.cpp:65:28: error: reference to 'next' is ambiguous
for(int i=head[u];i;i=next[i])
^
0_0_13130403_19203.cpp:14:38: note: candidates are: int next [62000]
int n,T,fa[N][lg],num,head[N],v[N*2],next[N*2],nn,dep[N],Fa[N],st[N*2],ed[N*2];
^
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_13130403_19203.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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