C++ question. Haven't a clue how to do it?

Hey bro, just get a book about Data Structures in C/C++. I'm sure there'll be a good one like "Data Structures And Algorithm ysis in C++" by Weiss in your school library. That's a very good book. That's a long answer and the goal of that subject is that you learn how to apply a general solution to a specific problem. So, just spend a couple of hours understanding it.