0_0_13849419_1852.cpp: In function 'bool tarjan(int)':
0_0_13849419_1852.cpp:18:61: error: reference to 'next' is ambiguous
#define fe(i,a,b) for(int i=first[(b)],_end_=(a);i!=_end_;i=next[i])
^
0_0_13849419_1852.cpp:48:5: note: in expansion of macro 'fe'
fe(i,0,node)
^
0_0_13849419_1852.cpp:23:21: note: candidates are: int next [100005]
int u[maxm],v[maxm],next[maxm],first[maxn];
^
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/stl_tree.h:61,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/map:60,
from 0_0_13849419_1852.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_13849419_1852.cpp: In function 'void work()':
0_0_13849419_1852.cpp:72:6: error: reference to 'next' is ambiguous
next[i]=first[u[i]];
^
0_0_13849419_1852.cpp:23:21: note: candidates are: int next [100005]
int u[maxm],v[maxm],next[maxm],first[maxn];
^
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/stl_tree.h:61,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/map:60,
from 0_0_13849419_1852.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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