#include "stdio.h"
#include "iostream.h"
class Node {
public:
  int data;
  Node();
  Node(int a);
};
Node::Node()
{
  data=0;
}

Node::Node(int a)
{
  data=a;
}

class LifoArray{

public:
  Node array[10];
  int count;
  LifoArray();
  int push(Node newNode);
  Node pop();

};

  int LifoArray:: push(Node newNode)
{
  if (!(count < 10))
    {
      return -1;
    }
  array[count]=newNode;
  count++;
  return 1;

}

  Node LifoArray:: pop()
{
  if (count==0)
    return (Node)(-1);
  count--;
  return array[count];
}



LifoArray::LifoArray()
{
  count=0;
}




int main()
{
  Node p(4);
  LifoArray a;
  a.push(p);
  Node b = a.pop();
  cout<<b.data;




}