0_0_17447387_27963.cpp: In function 'void add(int, int, int)':
0_0_17447387_27963.cpp:22:29: error: reference to 'next' is ambiguous
to[cnt]=v; len[cnt]=w; next[cnt]=head[u]; head[u]=cnt++;
^
0_0_17447387_27963.cpp:10:13: note: candidates are: int next [2000020]
int head[N],next[M<<1],to[M<<1],len[M<<1],dis[M<<1],hd[N],nt[M<<1],tu[M<<1],ln[M<<1],ans[M<<1],fa[N],pa[N];
^
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_17447387_27963.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_17447387_27963.cpp: In function 'void dfs(int)':
0_0_17447387_27963.cpp:66:27: error: reference to 'next' is ambiguous
for(int i=head[u];i>0;i=next[i])
^
0_0_17447387_27963.cpp:10:13: note: candidates are: int next [2000020]
int head[N],next[M<<1],to[M<<1],len[M<<1],dis[M<<1],hd[N],nt[M<<1],tu[M<<1],ln[M<<1],ans[M<<1],fa[N],pa[N];
^
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_17447387_27963.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_17447387_27963.cpp: In function 'void tarjan(int)':
0_0_17447387_27963.cpp:88:27: error: reference to 'next' is ambiguous
for(int i=head[u];i>0;i=next[i])
^
0_0_17447387_27963.cpp:10:13: note: candidates are: int next [2000020]
int head[N],next[M<<1],to[M<<1],len[M<<1],dis[M<<1],hd[N],nt[M<<1],tu[M<<1],ln[M<<1],ans[M<<1],fa[N],pa[N];
^
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_17447387_27963.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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