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View Compilation Error

0_0_14573430_28433.cpp: In function 'void add_edge(int, int, double)':
0_0_14573430_28433.cpp:24:33: error: reference to 'next' is ambiguous
     to[ecnt] = v; b[ecnt] = bi; next[ecnt] = head[u]; head[u] = ecnt++;
                                 ^
0_0_14573430_28433.cpp:13:15: note: candidates are: int next [50010]
 int to[MAXE], next[MAXE];
               ^
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_14573430_28433.cpp:2:
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_14573430_28433.cpp: In function 'double solve()':
0_0_14573430_28433.cpp:37:37: error: reference to 'next' is ambiguous
         for(int q = head[u]; q; q = next[q]) {
                                     ^
0_0_14573430_28433.cpp:13:15: note: candidates are: int next [50010]
 int to[MAXE], next[MAXE];
               ^
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_14573430_28433.cpp:2:
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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