0_0_28064636_31993.cpp: In function 'void add_edge(int, int)':
0_0_28064636_31993.cpp:28:2: error: reference to 'next' is ambiguous
next[ecnt]=first[u];first[u]=ecnt;e[ecnt++]=Edge(u,v);
^
0_0_28064636_31993.cpp:25:17: note: candidates are: int next [200010]
int first[maxn],next[maxm],ecnt;
^
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_28064636_31993.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_28064636_31993.cpp:29:2: error: reference to 'next' is ambiguous
next[ecnt]=first[v];first[v]=ecnt;e[ecnt++]=Edge(v,u);
^
0_0_28064636_31993.cpp:25:17: note: candidates are: int next [200010]
int first[maxn],next[maxm],ecnt;
^
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_28064636_31993.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_28064636_31993.cpp: In function 'void dfs1(int, int)':
0_0_28064636_31993.cpp:7:45: error: reference to 'next' is ambiguous
#define out(i,u) for(int i=first[u];i!=-1;i=next[i])
^
0_0_28064636_31993.cpp:40:2: note: in expansion of macro 'out'
out(i,u)
^
0_0_28064636_31993.cpp:25:17: note: candidates are: int next [200010]
int first[maxn],next[maxm],ecnt;
^
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_28064636_31993.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_28064636_31993.cpp: In function 'void dfs2(int)':
0_0_28064636_31993.cpp:7:45: error: reference to 'next' is ambiguous
#define out(i,u) for(int i=first[u];i!=-1;i=next[i])
^
0_0_28064636_31993.cpp:63:2: note: in expansion of macro 'out'
out(i,u) if(e[i].v!=fa[u]) dfs2(e[i].v);
^
0_0_28064636_31993.cpp:25:17: note: candidates are: int next [200010]
int first[maxn],next[maxm],ecnt;
^
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_28064636_31993.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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