Eroare de compilare in evaluator: user.cpp: In function 'void trie(long int)': user.cpp:20: error: no match for 'operator==' in 'f[cNod].std::map<_Key, _Tp, _Compare, _Alloc>::find [with _Key = char, _Tp = int, _Compare = std::less<char>, _Alloc = std::allocator<std::pair<const char, int> >](((const char&)((const char*)(& ch[j])))) == f[cNod].std::map<_Key, _Tp, _Compare, _Alloc>::end [with _Key = char, _Tp = int, _Compare = std::less<char>, _Alloc = std::allocator<std::pair<const char, int> >]' /usr/include/c++/4.2/bits/stl_tree.h:211: note: candidates are: bool std::_Rb_tree_iterator<_Tp>::operator==(const std::_Rb_tree_iterator<_Tp>&) const [with _Tp = std::pair<const char, int>] user.cpp:22: warning: operation on 'cNod' may be undefined