0_0_26219409_33.cpp: In function 'void add(int, int, int)':
0_0_26219409_33.cpp:26:19: error: reference to 'next' is ambiguous
last[++num]=y,next[num]=first[x],first[x]=num,chang[num]=z;
^
0_0_26219409_33.cpp:13:28: note: candidates are: int next [200007]
int first[maxn],last[maxn],next[maxn],chang[maxn],num;
^
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_26219409_33.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_26219409_33.cpp: In function 'void a_star()':
0_0_26219409_33.cpp:8:37: error: reference to 'next' is ambiguous
#define rep(i,a) for(i=first[a];i;i=next[i])
^
0_0_26219409_33.cpp:62:9: note: in expansion of macro 'rep'
rep(i,p.a){
^
0_0_26219409_33.cpp:13:28: note: candidates are: int next [200007]
int first[maxn],last[maxn],next[maxn],chang[maxn],num;
^
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_26219409_33.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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