I need help finding a book it's a science fiction book?

I read this book like 10 years ago and I'm trying to find it again not sure if I am remembering any of it correctly.  In it it's set in like a dystopian future where robots rule the land. There's these four rings that can control them or something and the robots can't destroy these rings. The main... show more I read this book like 10 years ago and I'm trying to find it again not sure if I am remembering any of it correctly. 

In it it's set in like a dystopian future where robots rule the land. There's these four rings that can control them or something and the robots can't destroy these rings. The main character changes it's sex to the opposite to hide itself and that's all I really remember.

If you could help me out that would be greatly appreciated. Thanks in advance.
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