Upon being freed, the prisoners' first thoughts are to get some food. They are so hungry that it never even occurs to them to get revenge upon the Nazi guards and officers who imprisoned and tortured them in the first place.
After their hunger is sated, some of the young men go into town to bring back clothes and more food for everyone else. However, Elie mentions that they also go into town to have sex with girls. Elie says there is still "no trace of revenge" in their characters.
Essentially, the prisoners are more interested in rejoining life and regaining pleasures than they are in hatred or hurting their tormentors. This goes to show just how exhausted they are with the whole business of the war. The tone is one of relief and fatigue.