Eroare de compilare: user.cpp: In function ‘void bellman_ford()’: user.cpp:26:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[cur].size(); i++) ^ user.cpp:30:17: error: reference to ‘prev’ is ambiguous prev[v[cur][i].node]= cur; ^ user.cpp:18:17: note: candidates are: int prev [50001] int best[nmax], prev[nmax], cycle[nmax]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^