Even if you deleted songs from your computer and hided them in iCloud there is a way to redownload songs.
If you purchased album type it in search field in store. Then don't click on album or it's price, WATCH TO SONGS SEARCH RESULT.
There is a list of songs. In this list find any ANY song from album your purchased and press on it's PRICE! Click "Buy", program will suggest you to download already purchased song FOR FREE!
DOWNLOAD song, then go to your LIBRARY. Open desired album from ALBUMS SECTION. Click "SHOW ALL ALBUM" at botom of album area. ALL SONGS WILL APPEAR with CLOUD ICONS. Press cloud icons to DOWNLOAD REST OF SONGS.