java-喝饮料换空瓶问题

//1
public class yinliao1
{
    public static void main(String args[])
    {
        int a=1000;
        int kong=1000; int he=1000;
        System.out.println("第1次："+" He="+he+" KONG="+kong);
        for(int i=2;i<=1000;++i)
        {
            int lk=kong;
            he+=lk/3;
            kong=kong-kong/3*3+lk/3;
            System.out.println("第"+i+"次:"+" He="+he+" KONG="+kong);
            if(kong<=2&&kong>=0)
                break;
        }
    }
}

//2
public class yinliao2
{
    public static void main(String args[])
    {
        int a=1000;
        int kong=0; int he=0;
        while(a>0)
        {
            a--;
            kong++;
            he++;
            if(kong==3)
            {
                a+=1;
                kong=0;
            }
        }
        System.out.println("HE DIAO:"+he+" KONG PING "+kong);
    }
}

//3
public class yinliao3
{
    public static void main(String args[])
    {
        int a=1000;
        int kong=0; int he=0;
        while(a>0)
        {
            kong+=a;
            he+=a;
            a=kong/3;
            kong-=a*3;
        }
        System.out.println("HE:"+he+" KONG:"+kong);
    }
}