List Removals

You are given a list consisting of n integers. Your task is to remove elements from the list at given positions, and report the removed elements. Input The first input line has an integer n: the initial size of the list. During the process, the elements are numbered 1,2,\dots,k where k is the current size of the list. The second line has n integers x_1,x_2,\dots,x_n: the contents of the list.