I got an interview after visiting a job fair at the university.

The process for a Junior or Student position is the same:

1. Phone interview (including technical questions)
2. Code assignment at the company office
3. Technical whiteboard interview
4. HR

1. In the phone interview:

Given an array of characters, you must delete all characters that appear 3 or more times consecutively. The problem must be solved in place, with O(1) memory and O(n) time complexity.

1. Code assignment at the company office:

Design a data structure for a given problem and implement methods such as search, delete, insert, and print by different orders.