CLion: Please leave comments in the code it will help me understand.

Primary U.S. interstate highways are numbered 199. Odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90) go east/west. Auxiliary highways are numbered 100999, and service the primary highway indicated by the rightmost two digits. Thus, l405 services l5, and l290 services l-90. Note: 200 is not a valid auxiliary highway because 00 is not a valid primary highway number. Given a highway number, indicate whether it is a primary or auxiliary highway. If auxiliary, indicate what primary highway it serves. Also indicate if the (primary) highway runs north/south or east/west. Ex: If the input is: 290 the output is: I290 is auxiliary, serving IBO, going east/west