@article{scalingdatadifficultyimprovingcodingmode,
  title = {Scaling Data Difficulty: Improving Coding Models via Reinforcement Learning on Fresh and Challenging Problems},
  author = {Zongqian Li and Tengchao Lv and Shaohan Huang and Yixuan Su and Qinzheng Sun and Qiufeng Yin and Ying Xin and Scarlett Li and Lei Cui and Nigel Collier and Furu Wei},
  year = {2026},
  eprint = {2603.07779},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2603.07779},
}