0_0_24490689_11474.cpp: In function 'void add(int, int)':
0_0_24490689_11474.cpp:13:2: error: reference to 'next' is ambiguous
next[k]=head[u];
^
0_0_24490689_11474.cpp:7:62: note: candidates are: int next [2000005]
int num,bridge,cnt,k,from[2000005],to[2000005],head[1000005],next[2000005],low[200005],dfn[200005],dis[200005],belong[200005];
^
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++/stack:60,
from 0_0_24490689_11474.cpp:2:
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_24490689_11474.cpp: In function 'int tarjan(int)':
0_0_24490689_11474.cpp:24:26: error: reference to 'next' is ambiguous
for(i=head[now];i!=-1;i=next[i])
^
0_0_24490689_11474.cpp:7:62: note: candidates are: int next [2000005]
int num,bridge,cnt,k,from[2000005],to[2000005],head[1000005],next[2000005],low[200005],dfn[200005],dis[200005],belong[200005];
^
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++/stack:60,
from 0_0_24490689_11474.cpp:2:
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_24490689_11474.cpp: In function 'int bfs(int)':
0_0_24490689_11474.cpp:65:28: error: reference to 'next' is ambiguous
for(i=head[temp];i!=-1;i=next[i])
^
0_0_24490689_11474.cpp:7:62: note: candidates are: int next [2000005]
int num,bridge,cnt,k,from[2000005],to[2000005],head[1000005],next[2000005],low[200005],dfn[200005],dis[200005],belong[200005];
^
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++/stack:60,
from 0_0_24490689_11474.cpp:2:
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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