Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:49:14: error: reference to ‘prev’ is ambiguous if ( prev[x]>0 ) { ^ user.cpp:18:5: note: candidates are: int prev [200001] int prev[nmax+1], ind[nmax+1]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, 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 ^ user.cpp:50:21: error: reference to ‘prev’ is ambiguous v[i].x= prev[x]; ^ user.cpp:18:5: note: candidates are: int prev [200001] int prev[nmax+1], ind[nmax+1]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, 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 ^ user.cpp:51:23: error: reference to ‘prev’ is ambiguous v[i].y= i-prev[x]; ^ user.cpp:18:5: note: candidates are: int prev [200001] int prev[nmax+1], ind[nmax+1]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, 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 ^ user.cpp:53:9: error: reference to ‘prev’ is ambiguous prev[x]= i; ^ user.cpp:18:5: note: candidates are: int prev [200001] int prev[nmax+1], ind[nmax+1]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, 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 ^