- 코드 #include using namespace std; class Node { public: int data; Node* prev; Node* next; Node() { this->prev = NULL; this->next = NULL; } }; class Iterator { public: Node* v; Iterator(Node* u) { v = u; } bool operator==(const Iterator &p) const { return this->v == p.v; } bool operator!=(const Iterator &p) const { return this->v != p.v; } int &operator*() { return v->data; } Iterator &operator++..