struct Node {
    int data;
    Node* next;

    Node(int data) {
        this->data = data;
        this->next = nullptr;
    }
};

class LinkedList {
private:
    Node* head;

public:
    LinkedList() {
        head = nullptr;
    }

    void add(int data) {
        Node* newNode = new Node(data);
        if (head == nullptr) {
            head = newNode;
        } else {
            Node* current = head;
            while (current->next != nullptr) {
                current = current->next;
            }
            current->next = newNode;
        }
    }

    void display() {
        Node* current = head;
        while (current != nullptr) {
            std::cout << current->data << " ";
            current = current->next;
        }
        std::cout << std::endl;
    }
   
    // Write above function here without struct keyword 
};