0_0_28506836_7166.cpp: In function 'void add(int, int)':
0_0_28506836_7166.cpp:13:2: error: reference to 'next' is ambiguous
next[tot]=head[x];
^
0_0_28506836_7166.cpp:9:15: note: candidates are: int next [2001000]
int ver[Maxn],next[Maxn],tot,head[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++/algorithm:61,
from 0_0_28506836_7166.cpp:3:
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_28506836_7166.cpp: In function 'int dfs(int)':
0_0_28506836_7166.cpp:18:24: error: reference to 'next' is ambiguous
for(int i=head[u];i;i=next[i])
^
0_0_28506836_7166.cpp:9:15: note: candidates are: int next [2001000]
int ver[Maxn],next[Maxn],tot,head[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++/algorithm:61,
from 0_0_28506836_7166.cpp:3:
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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