Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:65:29: error: reference to ‘prev’ is ambiguous prev[i][newr] = r; ^~~~ user.cpp:8:63: note: candidates are: int prev [1000001][21] int p[10], a[10][10], k, bigp[10], p10[MAXN], dp[MAXN][MAXK], prev[MAXN][MAXK]; ^~~~ 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/istream:38, from /usr/include/c++/6/fstream:38, from user.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 ^~~~ user.cpp:77:13: error: reference to ‘prev’ is ambiguous r = prev[i][r]; ^~~~ user.cpp:8:63: note: candidates are: int prev [1000001][21] int p[10], a[10][10], k, bigp[10], p10[MAXN], dp[MAXN][MAXK], prev[MAXN][MAXK]; ^~~~ 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/istream:38, from /usr/include/c++/6/fstream:38, from user.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 ^~~~