I used to participate in competitive programming. My Codeforces ID was AwD. I was also a former administrator of Universal Online Judge. (We provided the most challenging tasks in China!)

Efficient Near-Optimal Algorithm for Online Shortest Paths in Directed Acyclic Graphs with Bandit Feedback Against Adaptive AdversariesArnab Maiti*, Zhiyuan Fan*, Kevin Jamieson, Lillian J. Ratliff, Gabriele FarinaAccepted at the 38th Annual Conference on Learning Theory (COLT 2025). On the Optimality of Dilated Entropy and Lower Bounds for Online Learning in Extensive‑Form GamesZhiyuan Fan, Christian Kroer,…

Hi there! I am a second-year Ph.D. student in computer science at MIT, previously graduated from Yao Class at Tsinghua University. My research interest lies in theoretical machine learning and practical algorithms. Check out my CV for more details!