If you would like me to supervise your thesis, please contact me at least a few months in advance, while you are still thinking about the topic of your thesis.
If you would like to work on some research problems with me, please contact me at least 6 months in advance, better more. I will most likely propose to you some question in learning-augmented algorithms (or algorithms with predictions, see my past papers) which does not require too much of deep theoretical background to start working on and are suitable as a topic of a BSc or MSc thesis.