Jane Street Quant Interview Prep

Hey y'all quants,

I've got a third-round junior quant trading interview coming up with the infamous Jane Street Capital. Please give me ANY specific or general advice on how to be better prepared.

From my understanding, this is the penultimate round. I am willing to devote 50+ hours to prepare, so don't shy away from any preparation advice.

Cheers, cheers, and cheers in advance.