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View Compilation Error

0_0_33808815_12810.cpp: In function 'void init()':
0_0_33808815_12810.cpp:14:9: error: reference to 'next' is ambiguous
  memset(next,0,sizeof(next));
         ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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_33808815_12810.cpp:14:23: error: reference to 'next' is ambiguous
  memset(next,0,sizeof(next));
                       ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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_33808815_12810.cpp: In function 'void add(int, int)':
0_0_33808815_12810.cpp:21:8: error: reference to 'next' is ambiguous
  tot++;next[tot]=head[x];head[x]=tot;num[tot]=y;
        ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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_33808815_12810.cpp:22:8: error: reference to 'next' is ambiguous
  tot++;next[tot]=head[y];head[y]=tot;num[tot]=x;
        ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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_33808815_12810.cpp: In function 'void bfs(int)':
0_0_33808815_12810.cpp:28:25: error: reference to 'next' is ambiguous
   for(int i=head[u];i;i=next[i])
                         ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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_33808815_12810.cpp: In function 'int get(int, int)':
0_0_33808815_12810.cpp:58:27: error: reference to 'next' is ambiguous
   for(int i=head[now];i;i=next[i])if(num[i]!=fa[now][0]&&num[i]!=last_now)ans+=f[num[i]];
                           ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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_33808815_12810.cpp: In function 'void dfs(int, int)':
0_0_33808815_12810.cpp:65:26: error: reference to 'next' is ambiguous
  for(int i=head[now];i;i=next[i])
                          ^
0_0_33808815_12810.cpp:7:30: note: candidates are: int next [200005]
 int n,m,t,x,y,z,head[100005],next[200005],num[200005],tot;
                              ^
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++/vector:60,
                 from 0_0_33808815_12810.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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