package text.java;

import java.util.Stack;

public class stack_test {
    public static void main(String[] args) {
        Stack a= new Stack();
        System.out.println(a.empty());
        a.push(20192313);
        a.push(20192314);
        a.pop();
        a.push(20192304);
        a.push(20192325);
        a.pop();
        a.push(20192326);
        a.push(20192329);
        a.pop();
        a.push(20192307);
        System.out.println(a);
        System.out.println(a.peek());
    }
}