This is an old movie (about '70s-'80s) from East Europe (possibly Poland).
The main characters are two men (I think they were hibernated or something): they find themselves in this post-apocalyptic world in which only women survived, living undergroud. At the beginning the movie is funny, then it becomes evident that the society is a dictatorship and that people are oppressed; I remember that in order to control people there is this story: if you go out on the surface you die because of radiation, but the surface is actually safe (we find this out at the end).
Anyone can help?