0_0_14182419_5470.cpp: In function 'void add(int, int)':
0_0_14182419_5470.cpp:14:5: error: reference to 'next' is ambiguous
next[e] = first[x];
^
0_0_14182419_5470.cpp:9:14: note: candidates are: int next [200010]
int first[N],next[M],a[N],v[M],is[N],r[N];
^
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_14182419_5470.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_14182419_5470.cpp: In function 'int main()':
0_0_14182419_5470.cpp:57:52: error: reference to 'next' is ambiguous
for(int j = first[x]; j != -1; j = next[j])
^
0_0_14182419_5470.cpp:9:14: note: candidates are: int next [200010]
int first[N],next[M],a[N],v[M],is[N],r[N];
^
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_14182419_5470.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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