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View Compilation Error

0_0_33292638_10315.cpp: In function 'void add(int, int, int)':
0_0_33292638_10315.cpp:16:33: error: reference to 'next' is ambiguous
  cnt++;e[cnt].flow=c;e[cnt].v=v;next[cnt]=head[u];head[u]=cnt;
                                 ^
0_0_33292638_10315.cpp:13:31: note: candidates are: int next [500031]
 int n,m,s,T,cnt=-1,head[MAXN],next[MAXM],cur[MAXN],depth[MAXN],Queue[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++/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_33292638_10315.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_33292638_10315.cpp:17:33: error: reference to 'next' is ambiguous
  cnt++;e[cnt].flow=c;e[cnt].v=u;next[cnt]=head[v];head[v]=cnt;
                                 ^
0_0_33292638_10315.cpp:13:31: note: candidates are: int next [500031]
 int n,m,s,T,cnt=-1,head[MAXN],next[MAXM],cur[MAXN],depth[MAXN],Queue[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++/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_33292638_10315.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_33292638_10315.cpp: In function 'int dfs(int, int)':
0_0_33292638_10315.cpp:22:27: error: reference to 'next' is ambiguous
  for(int i=cur[u];i!=-1;i=next[i])
                           ^
0_0_33292638_10315.cpp:13:31: note: candidates are: int next [500031]
 int n,m,s,T,cnt=-1,head[MAXN],next[MAXM],cur[MAXN],depth[MAXN],Queue[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++/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_33292638_10315.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_33292638_10315.cpp: In function 'int main()':
0_0_33292638_10315.cpp:69:31: error: reference to 'next' is ambiguous
     for(int i=head[u];i!=-1;i=next[i])
                               ^
0_0_33292638_10315.cpp:13:31: note: candidates are: int next [500031]
 int n,m,s,T,cnt=-1,head[MAXN],next[MAXM],cur[MAXN],depth[MAXN],Queue[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++/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_33292638_10315.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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