0_0_32240345_32487.cpp: In function 'void add(int, int)':
0_0_32240345_32487.cpp:9:2: error: reference to 'next' is ambiguous
next[++tot]=first[x];
^
0_0_32240345_32487.cpp:6:34: note: candidates are: int next [20010]
int n,m,u,x,y,tot,in[N],first[N],next[M],to[M];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_32240345_32487.cpp:1:
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_32240345_32487.cpp: In function 'void topsort()':
0_0_32240345_32487.cpp:23:26: error: reference to 'next' is ambiguous
for(int e=first[u];e;e=next[e])if(!(--in[to[e]]))q.push(to[e]);
^
0_0_32240345_32487.cpp:6:34: note: candidates are: int next [20010]
int n,m,u,x,y,tot,in[N],first[N],next[M],to[M];
^
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++/deque:60,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
from 0_0_32240345_32487.cpp:1:
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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