1_734_208_2368.cpp: In function 'void add(int, int)':
1_734_208_2368.cpp:18:2: error: reference to 'next' is ambiguous
next[++cnt]=son[x]; son[x]=cnt; ed[cnt]=y;
^
1_734_208_2368.cpp:8:9: note: candidates are: int next [2000001]
int cnt,next[2000001],son[2000001],ed[2000001];
^
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 1_734_208_2368.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
^
1_734_208_2368.cpp: In function 'void dfs(int)':
1_734_208_2368.cpp:25:24: error: reference to 'next' is ambiguous
for (int j=son[u];j;j=next[j])
^
1_734_208_2368.cpp:8:9: note: candidates are: int next [2000001]
int cnt,next[2000001],son[2000001],ed[2000001];
^
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 1_734_208_2368.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
^
1_734_208_2368.cpp: In function 'int main()':
1_734_208_2368.cpp:70:28: error: reference to 'next' is ambiguous
for (int i=1;i<=cnt;i++) next[i]=ed[i]=0;
^
1_734_208_2368.cpp:8:9: note: candidates are: int next [2000001]
int cnt,next[2000001],son[2000001],ed[2000001];
^
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 1_734_208_2368.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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