0_0_15159147_617.cpp: In function 'void add(int, int)':
0_0_15159147_617.cpp:66:15: error: reference to 'next' is ambiguous
to[edge]=v,next[edge]=head[u],head[u]=edge++;
^
0_0_15159147_617.cpp:55:18: note: candidates are: int next [100014]
int a[N],head[N],next[2*N],to[N*2],edge;
^
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++/algorithm:61,
from 0_0_15159147_617.cpp:7:
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_15159147_617.cpp:67:15: error: reference to 'next' is ambiguous
to[edge]=u,next[edge]=head[v],head[v]=edge++;
^
0_0_15159147_617.cpp:55:18: note: candidates are: int next [100014]
int a[N],head[N],next[2*N],to[N*2],edge;
^
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++/algorithm:61,
from 0_0_15159147_617.cpp:7:
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_15159147_617.cpp: In function 'void dfs1(int, int, int)':
0_0_15159147_617.cpp:75:30: error: reference to 'next' is ambiguous
for(i = head[u]; ~i; i = next[i])
^
0_0_15159147_617.cpp:55:18: note: candidates are: int next [100014]
int a[N],head[N],next[2*N],to[N*2],edge;
^
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++/algorithm:61,
from 0_0_15159147_617.cpp:7:
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_15159147_617.cpp: In function 'void dfs2(int, int)':
0_0_15159147_617.cpp:97:30: error: reference to 'next' is ambiguous
for(i = head[u]; ~i; i = next[i])
^
0_0_15159147_617.cpp:55:18: note: candidates are: int next [100014]
int a[N],head[N],next[2*N],to[N*2],edge;
^
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++/algorithm:61,
from 0_0_15159147_617.cpp:7:
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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