Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:29:20: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ if (!ret.first._Ptr->_Parent->_Isnil) ^ user.cpp:30:31: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.insert(abs(ret.first._Ptr->_Myval - ret.first._Ptr->_Parent->_Myval)); ^ user.cpp:30:56: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.insert(abs(ret.first._Ptr->_Myval - ret.first._Ptr->_Parent->_Myval)); ^ user.cpp:40:12: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ if (!e._Ptr->_Left->_Isnil) ^ user.cpp:42:31: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.erase(dif.find(abs(e._Ptr->_Myval - e._Ptr->_Left->_Myval))); ^ user.cpp:42:48: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.erase(dif.find(abs(e._Ptr->_Myval - e._Ptr->_Left->_Myval))); ^ user.cpp:44:12: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ if (!e._Ptr->_Right->_Isnil) ^ user.cpp:46:31: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.erase(dif.find(abs(e._Ptr->_Myval - e._Ptr->_Right->_Myval))); ^ user.cpp:46:48: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.erase(dif.find(abs(e._Ptr->_Myval - e._Ptr->_Right->_Myval))); ^ user.cpp:48:12: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ if (!e._Ptr->_Parent->_Isnil) ^ user.cpp:50:31: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.erase(dif.find(abs(e._Ptr->_Myval - e._Ptr->_Parent->_Myval))); ^ user.cpp:50:48: error: ‘struct std::_Rb_tree_const_iterator<int>’ has no member named ‘_Ptr’ dif.erase(dif.find(abs(e._Ptr->_Myval - e._Ptr->_Parent->_Myval))); ^ user.cpp:83:25: error: ‘std::multiset<int>::iterator’ has no member named ‘_Ptr’ out << dif.begin()._Ptr->_Myval << '\n'; ^