CDE: Curiosity-Driven Exploration for Efficient Reinforcement Learning in Large Language Models - Dai, Runpeng; Song, Linfeng; Liu, Haolin; Liang, Zhenwen; Yu, Dian; Mi, Haitao; Tu, Zhaopeng; Liu, Rui; Zheng, Tong; Zhu, Hongtu; Yu, Dong (International Conference on Learning Representations, 2026)