Can LLMs Generate Reliable Test Case Generators? A Study on Competition-Level Programming Problems. - Yuhan Cao; Zian Chen; Kun Quan; Ziliang Zhang; Yu Wang; Xiaoning Dong; Yeqi Feng; Guanzhong He; Jingcheng Huang; Jianhao Li; Yixuan Tan; Jiafu Tang; et al. (CoRR, 2025)