0_0_16289458_19514.cpp: In function 'void add(int, int, int)':
0_0_16289458_19514.cpp:13:2: error: reference to 'next' is ambiguous
next[e]=first[a];
^
0_0_16289458_19514.cpp:8:14: note: candidates are: int next [600002]
int first[N],next[N<<1],v[N<<1],w[N<<1];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_16289458_19514.cpp:2:
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_16289458_19514.cpp: In function 'bool bfs()':
0_0_16289458_19514.cpp:26:22: error: reference to 'next' is ambiguous
for(i=first[a];i;i=next[i])
^
0_0_16289458_19514.cpp:8:14: note: candidates are: int next [600002]
int first[N],next[N<<1],v[N<<1],w[N<<1];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_16289458_19514.cpp:2:
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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