0_0_17030144_3408.cpp: In function 'void dfsorder(int)':
0_0_17030144_3408.cpp:98:29: error: reference to 'next' is ambiguous
for (int i=first[x];i!=0;i=next[i])
^
0_0_17030144_3408.cpp:19:18: note: candidates are: int next [200000]
int edge[200000],next[200000],first[120000]; int sum_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_17030144_3408.cpp:4:
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_17030144_3408.cpp: In function 'int main()':
0_0_17030144_3408.cpp:132:32: error: reference to 'next' is ambiguous
sum_edge++,edge[sum_edge]=y,next[sum_edge]=first[x],first[x]=sum_edge;
^
0_0_17030144_3408.cpp:19:18: note: candidates are: int next [200000]
int edge[200000],next[200000],first[120000]; int sum_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_17030144_3408.cpp:4:
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_17030144_3408.cpp:133:32: error: reference to 'next' is ambiguous
sum_edge++,edge[sum_edge]=x,next[sum_edge]=first[y],first[y]=sum_edge;
^
0_0_17030144_3408.cpp:19:18: note: candidates are: int next [200000]
int edge[200000],next[200000],first[120000]; int sum_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_17030144_3408.cpp:4:
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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