Eroare de compilare: user.cpp: In function ‘int bfs()’: user.cpp:39:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[nod].size(); i++) { ^ user.cpp:45:5: error: reference to ‘prev’ is ambiguous prev[vecin] = nod; ^ user.cpp:12:40: note: candidates are: int prev [100005] int n, m, x, dist[MAX_N], from[MAX_N], prev[MAX_N]; ^ 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:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^ user.cpp:48:24: error: reference to ‘prev’ is ambiguous } else if (vecin != prev[nod] && X[from[vecin]] && from[vecin] != from[nod]) { ^ user.cpp:12:40: note: candidates are: int prev [100005] int n, m, x, dist[MAX_N], from[MAX_N], prev[MAX_N]; ^ 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:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^