@article{difficultyestimatedpolicyoptimization,
  title = {Difficulty-Estimated Policy Optimization},
  author = {Yu Zhao and Fan Jiang and Tianle Liu and Bo Zeng and Yu Liu and Longyue Wang and Weihua Luo},
  year = {2026},
  eprint = {2602.06375},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2602.06375},
}