JavaEx

import java.util.*;
import java.lang.*;
import java.io.*;

class GStack<T> {
    int tos;
    Object [] stck;

    public GStack() {
        tos = 0;
        stck = new Object [5];
    }
    public boolean isFull() {
        for (tos = 4; tos >= 0; tos--)
            if (stck[tos] == null) {
                System.out.print("빈 배열>>" + tos);
                return false;
            }
        System.out.println("가득찬 배열");
        return true;
    }
    public boolean isEmpty() {
        for ( tos = 0; tos < 5; tos++) {
            if (stck[tos] != null) {
                System.out.print("채워진 배열" + tos);
                return false;
            }
        }
        System.out.println("빈 배열");
        return true;
    }
    
    public void push(T item) {
        if ( tos == 5 ) return ;
        stck[tos] = item;
        System.out.print(">>>" + tos);
    }
    
    public T pop() {
        return (T)stck[tos];
    }
}

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        GStack<String> g = new GStack<String>();
        int cnt = 4;
        while (true) {
            String s = scanner.next();
            if (s.equals("exit") || g.isFull()) break;
            g.push(s);
            System.out.println(">>"+g.stck[cnt]+">>"+ cnt);
            cnt--;
        }
        for (int i = 0; i<5; i++) {
            if (g.isEmpty()) return ;
            System.out.println("-" + g.pop());
            g.stck[i] = null;
        }
    }
}