Eroare de compilare: main.cpp: In function 'void Astar()': main.cpp:87:31: error: reference to 'prev' is ambiguous pq.push(nxt), prev[nxt.y][nxt.x]=now, viz[nxt.y][nxt.x]=1; ^~~~ main.cpp:30:7: note: candidates are: coord prev [1001][1001] coord prev[1001][1001]; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator_base_funcs.h:217:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^~~~ main.cpp: In function 'void traceback()': main.cpp:95:74: error: reference to 'prev' is ambiguous while(nav.y!=ys || nav.x!=xs) minn=min(minn, mat[nav.y][nav.x]), nav=prev[nav.y][nav.x], viz[nav.y][nav.x]=2; ^~~~ main.cpp:30:7: note: candidates are: coord prev [1001][1001] coord prev[1001][1001]; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator_base_funcs.h:217:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^~~~ Non zero exit status: 1