what is R(reward) means

[Yukang-Lin]

Hi, thanks for your great work.
I am confuse for the code R(rewards). Is that a typo error or something?

https://github.com/lifan-yuan/ImplicitPRM/blob/352f1cd8f9b0e7d4245a2e3fa148da97bd745259/eval/prm_eval_utils.py#L459

[X1AOX1A]

Hi, any update of this issue?