foo.cpp: In function 'void add(int, int)':
foo.cpp:25:2: error: reference to 'next' is ambiguous
next[tt]=head[x];
^
foo.cpp:14:24: note: candidates are: int next [1050]
int v[1050],head[1050],next[1050];
^
In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\stl_algobase.h:66:0,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\char_traits.h:39,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ios:40,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ostream:38,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\iostream:39,
from foo.cpp:2:
c:\mingw\lib\gcc\mingw32\4.8.1\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
^
foo.cpp: In function 'void dfs(int)':
foo.cpp:32:24: error: reference to 'next' is ambiguous
for(int i=head[k];i;i=next[i])
^
foo.cpp:14:24: note: candidates are: int next [1050]
int v[1050],head[1050],next[1050];
^
In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\stl_algobase.h:66:0,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\char_traits.h:39,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ios:40,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\ostream:38,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\iostream:39,
from foo.cpp:2:
c:\mingw\lib\gcc\mingw32\4.8.1\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
^