Implement task in C++

We extended previous Problem by adding extra queries: This problem is simple. Initially, there is a list and it's empty. Then you are given four types of query. 1. Insert data to the list 2. Remove data from the list 3. Print an index (1-based) from a specified data after the list was sorted ascendingly 4. Print data from a specified index (1-based) after the list was sorted ascendingly We want to make insertion, deletion, getting operations in O(logz(n)) Input Input contains several lines. Each line follows one of these formats. 1 n: Insert n (0