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View Compilation Error

0_0_13882672_15842.cpp: In function 'void add(int, int)':
0_0_13882672_15842.cpp:24:5: error: reference to 'next' is ambiguous
     next[++tot]=last[o]; last[o]=tot; to[tot]=p;
     ^
0_0_13882672_15842.cpp:17:56: note: candidates are: int next [20005]
 int tt[10005],uu[10005],v[10005],last[10005],to[20005],next[20005];
                                                        ^
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++/algorithm:61,
                 from 0_0_13882672_15842.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_13882672_15842.cpp: In function 'void build(int)':
0_0_13882672_15842.cpp:30:26: error: reference to 'next' is ambiguous
   for (int i=last[k];i;i=next[i]) {
                          ^
0_0_13882672_15842.cpp:17:56: note: candidates are: int next [20005]
 int tt[10005],uu[10005],v[10005],last[10005],to[20005],next[20005];
                                                        ^
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++/algorithm:61,
                 from 0_0_13882672_15842.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_13882672_15842.cpp: In function 'void dfs(int, int, int)':
0_0_13882672_15842.cpp:53:28: error: reference to 'next' is ambiguous
     for (int i=last[o];i;i=next[i]) {
                            ^
0_0_13882672_15842.cpp:17:56: note: candidates are: int next [20005]
 int tt[10005],uu[10005],v[10005],last[10005],to[20005],next[20005];
                                                        ^
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++/algorithm:61,
                 from 0_0_13882672_15842.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_13882672_15842.cpp: In function 'void geta(int)':
0_0_13882672_15842.cpp:60:28: error: reference to 'next' is ambiguous
     for (int i=last[o];i;i=next[i]) {
                            ^
0_0_13882672_15842.cpp:17:56: note: candidates are: int next [20005]
 int tt[10005],uu[10005],v[10005],last[10005],to[20005],next[20005];
                                                        ^
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++/algorithm:61,
                 from 0_0_13882672_15842.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_13882672_15842.cpp: In function 'void getdfsxu(int)':
0_0_13882672_15842.cpp:143:25: error: reference to 'next' is ambiguous
  for (int i=last[o];i;i=next[i]) {
                         ^
0_0_13882672_15842.cpp:17:56: note: candidates are: int next [20005]
 int tt[10005],uu[10005],v[10005],last[10005],to[20005],next[20005];
                                                        ^
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++/algorithm:61,
                 from 0_0_13882672_15842.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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