AdaSTaR: Adaptive Data Sampling for Training Self-Taught Reasoners. - Reiss Koh; Wonbeen Oh; Jaein Jang; Minhyung Lee; Hyeongjin Kim; Ah Yeon Kim; Joonkee Kim; Junghyun Lee; Taehyeon Kim 001; Se-Young Yun (NeurIPS, 2025)