0_0_20389971_11398.cpp: In function 'void add(int, int, int)':
0_0_20389971_11398.cpp:16:2: error: reference to 'next' is ambiguous
next[++cnt]=head[f];
^
0_0_20389971_11398.cpp:13:32: note: candidates are: int next [200100]
int cnt,head[N],to[M*2],v[M*2],next[M*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_20389971_11398.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_20389971_11398.cpp: In function 'void tarjan(int)':
0_0_20389971_11398.cpp:34:28: error: reference to 'next' is ambiguous
for(int i=head[u];i!=-1;i=next[i])
^
0_0_20389971_11398.cpp:13:32: note: candidates are: int next [200100]
int cnt,head[N],to[M*2],v[M*2],next[M*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_20389971_11398.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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