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View Compilation Error

0_0_36161685_21371.cpp: In function 'void origin()':
0_0_36161685_21371.cpp:23:38: error: reference to 'next' is ambiguous
     for (int i=1;i<=n;i++) tail[i]=i,next[i]=0;
                                      ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp: In function 'void link(int, int, int)':
0_0_36161685_21371.cpp:37:7: error: reference to 'next' is ambiguous
  ++ss,next[tail[x]]=ss,tail[x]=ss,sora[ss]=y,cost[ss]=z,next[ss]=0;
       ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp:37:57: error: reference to 'next' is ambiguous
  ++ss,next[tail[x]]=ss,tail[x]=ss,sora[ss]=y,cost[ss]=z,next[ss]=0;
                                                         ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp:38:7: error: reference to 'next' is ambiguous
  ++ss,next[tail[y]]=ss,tail[y]=ss,sora[ss]=x,cost[ss]=z,next[ss]=0;
       ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp:38:57: error: reference to 'next' is ambiguous
  ++ss,next[tail[y]]=ss,tail[y]=ss,sora[ss]=x,cost[ss]=z,next[ss]=0;
                                                         ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp: In function 'void dij(int, int&)':
0_0_36161685_21371.cpp:56:25: error: reference to 'next' is ambiguous
         for (int i=x,ne;next[i];) {
                         ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp:57:15: error: reference to 'next' is ambiguous
             i=next[i],ne=sora[i];
               ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp: In function 'void spfa(int, int)':
0_0_36161685_21371.cpp:74:25: error: reference to 'next' is ambiguous
         for (int i=x,ne;next[i];) {
                         ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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_36161685_21371.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_36161685_21371.cpp:75:15: error: reference to 'next' is ambiguous
             i=next[i],ne=sora[i];
               ^
0_0_36161685_21371.cpp:13:5: note: candidates are: int next [2000000]
 int next[2000000],sora[2000000],cost[2000000],st[500000],u[500000],tail[500000],b[2000000];
     ^
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


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