Before revision:  This problem was introduced by Funke, Krumpe, and Storandt IWOCA 2016 . We provide the first general subquadratic algorithm for computing the times and the order of disappearance.
After revision:  This problem was introduced by Funke, Krumpe, and Storandt The goal is to determine the elimination order, i.e., the order in which the disks disappear . We provide the first general subquadratic algorithm for computing the times and the order of disappearance.