Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:108:13: error: reference to ‘prev’ is ambiguous prev.push_back(make_pair(i, f[i])); ^ user.cpp:9:27: note: candidates are: std::vector<std::pair<int, int> > prev vector <pair <int, int> > prev, nxt; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/stl_tree.h:61, from /usr/include/c++/4.8/map:60, from user.cpp:2: /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:134:29: error: reference to ‘prev’ is ambiguous for (int i = 0; i < prev.size(); ++i) ^ user.cpp:9:27: note: candidates are: std::vector<std::pair<int, int> > prev vector <pair <int, int> > prev, nxt; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/stl_tree.h:61, from /usr/include/c++/4.8/map:60, from user.cpp:2: /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:135:15: error: reference to ‘prev’ is ambiguous f[prev[i].first] = 0; ^ user.cpp:9:27: note: candidates are: std::vector<std::pair<int, int> > prev vector <pair <int, int> > prev, nxt; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/stl_tree.h:61, from /usr/include/c++/4.8/map:60, from user.cpp:2: /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:136:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < nxt.size(); ++i) { ^ user.cpp:137:13: error: reference to ‘prev’ is ambiguous prev[i] = nxt[i]; ^ user.cpp:9:27: note: candidates are: std::vector<std::pair<int, int> > prev vector <pair <int, int> > prev, nxt; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0,