import java.util.*;
public class Stack {
/*
public int counter=0;
ArrayList array = new ArrayList(10);
//your code is here
public void push(int num){
//your code is here
array.add(num);
counter++;
}
public void pop() {
//your code is here
array.remove(counter - 1);
counter--;
System.out.println("hello");
}
public static void main(String[] args){
//stack tester
Stack STACK1;
STACK1 = new Stack();
STACK1.push(23);
STACK1.push(11);
STACK1.push(2);
System.out.println(STACK1.array);
STACK1.pop();
STACK1.pop();
System.out.println(STACK1.array);
}
*/
}