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View Compilation Error

0_0_21991290_10574.cpp: In function 'int copyNode(int)':
0_0_21991290_10574.cpp:40:6: error: reference to 'next' is ambiguous
      next[total][0] = next[x][0] ;
      ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:40:23: error: reference to 'next' is ambiguous
      next[total][0] = next[x][0] ;
                       ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:41:6: error: reference to 'next' is ambiguous
      next[total][1] = next[x][1] ;
      ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:41:23: error: reference to 'next' is ambiguous
      next[total][1] = next[x][1] ;
                       ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp: In function 'int add(int, int)':
0_0_21991290_10574.cpp:51:10: error: reference to 'next' is ambiguous
          next[now][son] = copyNode(next[now][son]) ;
          ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:51:36: error: reference to 'next' is ambiguous
          next[now][son] = copyNode(next[now][son]) ;
                                    ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:52:19: error: reference to 'next' is ambiguous
             now = next[now][son] ;
                   ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp: In function 'int query(int, int, int)':
0_0_21991290_10574.cpp:62:14: error: reference to 'next' is ambiguous
       if(cnt[next[r][son]] - cnt[next[l][son]] > 0){
              ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:62:34: error: reference to 'next' is ambiguous
       if(cnt[next[r][son]] - cnt[next[l][son]] > 0){
                                  ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:64:12: error: reference to 'next' is ambiguous
        l = next[l][son] ;
            ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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_21991290_10574.cpp:65:12: error: reference to 'next' is ambiguous
        r = next[r][son] ;
            ^
0_0_21991290_10574.cpp:34:10: note: candidates are: int next [3000060][2]
     int  next[N*30][2] ;
          ^
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_21991290_10574.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(_ForwardIter


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