0_0_28989931_30271.cpp: In function 'void add(int, int)':
0_0_28989931_30271.cpp:15:17: error: reference to 'next' is ambiguous
ver[edge]=v;next[edge]=head[u];head[u]=edge++;
^
0_0_28989931_30271.cpp:9:13: note: candidates are: int next [3333333]
int ver[mm],next[mm];
^
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++/bits/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
from 0_0_28989931_30271.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_28989931_30271.cpp: In function 'void dfs(int)':
0_0_28989931_30271.cpp:21:32: error: reference to 'next' is ambiguous
for(int i=head[u],v;i>=0;i=next[i])
^
0_0_28989931_30271.cpp:9:13: note: candidates are: int next [3333333]
int ver[mm],next[mm];
^
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++/bits/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
from 0_0_28989931_30271.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_28989931_30271.cpp:23:42: error: 'v' was not declared in this scope
dfs(v);low[u]=min(low[u],low[v]);
^
0_0_28989931_30271.cpp:24:9: error: 'else' without a previous 'if'
else if(!id[v])low[u]=min(low[u],dfn[v]);
^
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