0_0_19406421_11027.cpp: In function 'void merge(int, int)':
0_0_19406421_11027.cpp:26:27: error: reference to 'next' is ambiguous
for (int i=head[a]; i; i=next[i]){
^
0_0_19406421_11027.cpp:6:44: note: candidates are: int next [100005]
int head[N],f[N],st[N],p[N],c[maxn],len[N],next[maxn];
^
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++/algorithm:61,
from 0_0_19406421_11027.cpp:3:
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_19406421_11027.cpp:30:27: error: reference to 'next' is ambiguous
for (int i=head[a]; i; i=next[i]) c[i]=b;
^
0_0_19406421_11027.cpp:6:44: note: candidates are: int next [100005]
int head[N],f[N],st[N],p[N],c[maxn],len[N],next[maxn];
^
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++/algorithm:61,
from 0_0_19406421_11027.cpp:3:
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_19406421_11027.cpp:31:2: error: reference to 'next' is ambiguous
next[st[b]]=head[a]; st[b]=st[a]; len[b]+=len[a];
^
0_0_19406421_11027.cpp:6:44: note: candidates are: int next [100005]
int head[N],f[N],st[N],p[N],c[maxn],len[N],next[maxn];
^
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++/algorithm:61,
from 0_0_19406421_11027.cpp:3:
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_19406421_11027.cpp: In function 'int main()':
0_0_19406421_11027.cpp:46:4: error: reference to 'next' is ambiguous
next[i]=head[c[i]]; head[c[i]]=i;
^
0_0_19406421_11027.cpp:6:44: note: candidates are: int next [100005]
int head[N],f[N],st[N],p[N],c[maxn],len[N],next[maxn];
^
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++/algorithm:61,
from 0_0_19406421_11027.cpp:3:
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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