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View Compilation Error

0_0_13850741_26037.cpp: In function 'int main()':
0_0_13850741_26037.cpp:99:13: error: reference to 'next' is ambiguous
           { next[rk[i-1]]=rk[i]; i++;}
             ^
0_0_13850741_26037.cpp:12:23: note: candidates are: int next [210000]
     a[maxn],mex[maxn],next[maxn],rk[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++/string:40,
                 from 0_0_13850741_26037.cpp:4:
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_13850741_26037.cpp:100:7: error: reference to 'next' is ambiguous
       next[rk[i-1]]=n+1;
       ^
0_0_13850741_26037.cpp:12:23: note: candidates are: int next [210000]
     a[maxn],mex[maxn],next[maxn],rk[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++/string:40,
                 from 0_0_13850741_26037.cpp:4:
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_13850741_26037.cpp:109:14: error: reference to 'next' is ambiguous
     fr=i; to=next[i]-1; v=a[i];
              ^
0_0_13850741_26037.cpp:12:23: note: candidates are: int next [210000]
     a[maxn],mex[maxn],next[maxn],rk[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++/string:40,
                 from 0_0_13850741_26037.cpp:4:
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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