Is PRM Necessary? Problem-Solving RL Implicitly Induces PRM Capability in LLMs - Feng, Zhangyin; Chen, Qianglong; Lu, Ning; Li, Yongqian; Cheng, Siqi; Peng, Shuangmu; Tang, Duyu; Liu, Shengcai; Zhang, Zhirui (Advances in Neural Information Processing Systems, 2025)