@misc{sha2026thinkprior,
  title  = {ThinkPrior: Zero-Rollout Difficulty Priors for Cold-Start Prompt Selection in RLVR},
  author = {Sha, Tommy and Zhai, Skylar and Zhao, Siqi},
  year   = {2026},
  note   = {Preprint},
  url    = {https://shatianming5.github.io/thinkprior/}
}