Convert Subqueries To Join

Hi all,
Recently saw some posts about how bad it is using subqueries (nested queries) and things like all the queries can be written with JOIN instead. However, for a query like the followings, I cannot figure out how to do it properly.

The data looks like the following, it contains 3 columns, id, which is the primary key of the table (unique), group, as which group this entry belongs to, and the article type, where 0 is not an article.

id grp article
1 1 0
2 1 0
3 1 0
4 1 3
5 1 2
6 1 0
7 2 0
8 2 3
9 2 1
10 2 0
11 2 0
12 2 0
13 3 5
14 3 2
15 3 0
16 3 0
17 3 1
18 3 1

What the query is trying to achieve is for each group, get the latest (maximum) id, and the article type (bear in mind "0" is not one of the allowed type). so for data above, the result will look something like this...

id grp article
5 1 2
9 2 1
18 3 1

The following is the query I come up with, the problem is, I don't know how to get the same result without using subquery. I don't even see how it is possible. Guys, please share some light with me, and educate me on this.

select a.id, a.grp, b.article
from
(
SELECT max(id) as id, grp
from list a
where article != 0
group by grp
) a
join list b
on a.id = b.id


thanks in advance!!!