Eroare de compilare: user.cpp: In function ‘void back(int)’: user.cpp:34:15: error: reference to ‘next’ is ambiguous for(int i=next[0];i<n+1;i=next[i]){ ^ user.cpp:8:21: note: candidates are: int next [30] int fd1[30],fd2[30],next[30],last[30],v[30],sol[30],n,nr; ^ In file included from /usr/include/c++/5/bits/stl_algobase.h:66:0, from /usr/include/c++/5/bits/char_traits.h:39, from /usr/include/c++/5/ios:40, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/c++/5/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 ^ user.cpp:34:31: error: reference to ‘next’ is ambiguous for(int i=next[0];i<n+1;i=next[i]){ ^ user.cpp:8:21: note: candidates are: int next [30] int fd1[30],fd2[30],next[30],last[30],v[30],sol[30],n,nr; ^ In file included from /usr/include/c++/5/bits/stl_algobase.h:66:0, from /usr/include/c++/5/bits/char_traits.h:39, from /usr/include/c++/5/ios:40, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/c++/5/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 ^ user.cpp:39:13: error: reference to ‘next’ is ambiguous next[last[i]]=next[i]; ^ user.cpp:8:21: note: candidates are: int next [30] int fd1[30],fd2[30],next[30],last[30],v[30],sol[30],n,nr; ^ In file included from /usr/include/c++/5/bits/stl_algobase.h:66:0, from /usr/include/c++/5/bits/char_traits.h:39, from /usr/include/c++/5/ios:40, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/c++/5/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 ^ user.cpp:39:27: error: reference to ‘next’ is ambiguous next[last[i]]=next[i]; ^ user.cpp:8:21: note: candidates are: int next [30]