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View Compilation Error

0_0_38588595_8550.cpp: In function 'void add_edge(int, int, LL)':
0_0_38588595_8550.cpp:45:37: error: reference to 'next' is ambiguous
     to[ecnt] = v; weight[ecnt] = w; next[ecnt] = head[u]; head[u] = ecnt++;
                                     ^~~~
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/stl_algobase.h:66,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/char_traits.h:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ios:40,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ostream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/iostream:39,
                 from 0_0_38588595_8550.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/stl_iterator_base_funcs.h:213:5: note: candidates are: 'template<class _InputIterator> constexpr _InputIterator std::next(_InputIterator, typename std::iterator_traits<_Iter>::difference_type)'
     next(_InputIterator __x, typename
     ^~~~
0_0_38588595_8550.cpp:33:15: note:                 'int next [200010]'
 int to[MAXE], next[MAXE];
               ^~~~
0_0_38588595_8550.cpp: In function 'void change()':
0_0_38588595_8550.cpp:56:33: error: reference to 'next' is ambiguous
     for(int p = head[x]; p; p = next[p]) {
                                 ^~~~
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/stl_algobase.h:66,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/char_traits.h:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ios:40,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ostream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/iostream:39,
                 from 0_0_38588595_8550.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/bits/stl_iterator_base_funcs.h:213:5: note: candidates are: 'template<class _InputIterator> constexpr _InputIterator std::next(_InputIterator, typename std::iterator_traits<_Iter>::difference_type)'
     next(_InputIterator __x, typename
     ^~~~
0_0_38588595_8550.cpp:33:15: note:                 'int next [200010]'
 int to[MAXE], next[MAXE];
               ^~~~


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