Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:33:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (jj=0;jj<pos[i].size();++jj) ^ user.cpp:38:13: error: reference to ‘prev’ is ambiguous prev = i; ^ user.cpp:9:31: note: candidates are: int prev int N,teste,ans,j,i,jj,q,y,nr,prev,t,l,r,mid; ^ 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/istream:38, from /usr/include/c++/4.8/fstream:38, 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:51:38: error: reference to ‘prev’ is ambiguous if (h[y][mid] >= prev) ^ user.cpp:9:31: note: candidates are: int prev int N,teste,ans,j,i,jj,q,y,nr,prev,t,l,r,mid; ^ 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/istream:38, from /usr/include/c++/4.8/fstream:38, 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:60:17: error: reference to ‘prev’ is ambiguous prev = h[y][t]; ^ user.cpp:9:31: note: candidates are: int prev int N,teste,ans,j,i,jj,q,y,nr,prev,t,l,r,mid; ^ 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/istream:38, from /usr/include/c++/4.8/fstream:38, 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 ^