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View Compilation Error

0_0_16477669_25813.cpp: In function 'void add(int, int, int)':
0_0_16477669_25813.cpp:17:2: error: reference to 'next' is ambiguous
  next[ce]=head[x];
  ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp:21:2: error: reference to 'next' is ambiguous
  next[ce]=head[y];
  ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp: In function 'bool BFS()':
0_0_16477669_25813.cpp:33:25: error: reference to 'next' is ambiguous
   for(int i=head[x];i;i=next[i])
                         ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp: In function 'int dfs(int, int)':
0_0_16477669_25813.cpp:48:20: error: reference to 'next' is ambiguous
  for(i=head[x];i;i=next[i])
                    ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp: In function 'int main()':
0_0_16477669_25813.cpp:105:12: error: reference to 'next' is ambiguous
   head[st]=next[head[st]];
            ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp:106:12: error: reference to 'next' is ambiguous
   head[en]=next[head[en]];
            ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp:107:21: error: reference to 'next' is ambiguous
   for(i=head[S];i;i=next[i])
                     ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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_16477669_25813.cpp:109:21: error: reference to 'next' is ambiguous
   for(i=head[T];i;i=next[i])
                     ^
0_0_16477669_25813.cpp:9:5: note: candidates are: int next [2210]
 int next[M],to[M],flow[M],head[N],ce;
     ^
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++/deque:60,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/queue:60,
                 from 0_0_16477669_25813.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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