Eroare de compilare: user.cpp: In function ‘void Init_buffer()’: user.cpp:21:29: warning: passing NULL to non-pointer argument 3 of ‘std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(std::basic_istream<_CharT, _Traits>::char_type*, std::streamsize, std::basic_istream<_CharT, _Traits>::char_type) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::char_type = char; std::streamsize = int]’ [-Wconversion-null] f.getline(buffer,lg,NULL); ^ user.cpp: In function ‘void Citire()’: user.cpp:42:9: error: reference to ‘next’ is ambiguous next[x].push_back(make_pair(y,c)); ^ user.cpp:9:26: note: candidates are: std::vector<std::pair<short int, int> > next [100004] vector< pair<short,int> >next[Nmax]; ^ In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:66:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/local/include/c++/4.8.0/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:43:9: error: reference to ‘next’ is ambiguous next[y].push_back(make_pair(x,-c)); ^ user.cpp:9:26: note: candidates are: std::vector<std::pair<short int, int> > next [100004] vector< pair<short,int> >next[Nmax]; ^ In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:66:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/local/include/c++/4.8.0/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: In function ‘void Dfs(short int)’: user.cpp:55:49: error: reference to ‘next’ is ambiguous for(vector< pair<short ,int> >::iterator it=next[nod].begin();ok &&it!=next[nod].end();it++) ^ user.cpp:9:26: note: candidates are: std::vector<std::pair<short int, int> > next [100004] vector< pair<short,int> >next[Nmax]; ^ In file included from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:66:0, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/local/include/c++/4.8.0/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