#include <iostream>
using namespace std;

class Node {

public:
 int data;
 Node* nxtNode;
 Node(int _data) {
  data=_data;//Data
  nxtNode=NULL;//Next element pointer
 }
};

class LinkedList {
 Node* current;
public:
 LinkedList() {
  current=NULL;
 }
 void insert(Node * _node) {
  if (current==NULL) {
   current= _node;//first node
  } else {
   (*_node).nxtNode=current;
   current= _node;//2nd node starts
  }
 }

 void displayAll() {
  Node* tmp=current;
  while (tmp!=NULL) {
   cout << (*tmp).data <<endl;
   tmp=(*tmp).nxtNode;
  }
 }
};

int main() {
 Node* firstNode=new Node(1);
 Node* secondNode=new Node(2);
 Node* thirdNode=new Node(3);
 LinkedList ll;
 ll.insert(firstNode);
 ll.insert(secondNode);
 ll.insert(thirdNode);
 ll.displayAll();
 return 0;
}