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View Compilation Error

0_0_38688432_30773.cpp: In function 'void add(int, int, int)':
0_0_38688432_30773.cpp:43:26: error: reference to 'next' is ambiguous
   43 |     to[edge]=v,w[edge]=c,next[edge]=head[u],head[u]=edge++;
      |                          ^~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_construct.h:62,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/char_traits.h:57,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ios:42,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:40,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:41,
                 from 0_0_38688432_30773.cpp:1:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator_base_funcs.h:232:5: note: candidates are: 'template<class _InputIterator> constexpr _InputIterator std::next(_InputIterator, typename iterator_traits<_Iter>::difference_type)'
  232 |     next(_InputIterator __x, typename
      |     ^~~~
0_0_38688432_30773.cpp:9:25: note:                 'int next [2000005]'
    9 | int head[maxn],to[maxm],next[maxm],w[maxm],edge;
      |                         ^~~~
0_0_38688432_30773.cpp:44:26: error: reference to 'next' is ambiguous
   44 |     to[edge]=u,w[edge]=c,next[edge]=head[v],head[v]=edge++;
      |                          ^~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator_base_funcs.h:232:5: note: candidates are: 'template<class _InputIterator> constexpr _InputIterator std::next(_InputIterator, typename iterator_traits<_Iter>::difference_type)'
  232 |     next(_InputIterator __x, typename
      |     ^~~~
0_0_38688432_30773.cpp:9:25: note:                 'int next [2000005]'
    9 | int head[maxn],to[maxm],next[maxm],w[maxm],edge;
      |                         ^~~~
0_0_38688432_30773.cpp: In function 'void bfs(int)':
0_0_38688432_30773.cpp:59:34: error: reference to 'next' is ambiguous
   59 |         for(int i=head[u]; ~i; i=next[i])
      |                                  ^~~~
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_iterator_base_funcs.h:232:5: note: candidates are: 'template<class _InputIterator> constexpr _InputIterator std::next(_InputIterator, typename iterator_traits<_Iter>::difference_type)'
  232 |     next(_InputIterator __x, typename
      |     ^~~~
0_0_38688432_30773.cpp:9:25: note:                 'int next [2000005]'
    9 | int head[maxn],to[maxm],next[maxm],w[maxm],edge;
      |                         ^~~~


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