Chapter 5 · Structure rooms
Know the room on sight
Finish by reading the architecture before any character begins to move.

Picture path
- A landing branches into child flights above and below. Which data structure is the place itself?Read parent-and-child architecture, not the technique a visitor might perform on it.
- Opening one letter drawer reveals the next letter drawers deeper inside. Which structure is this room?The route is built one character at a time and shared beginnings use the same early drawers.
- Only the top plate can be removed from a tall tower and new plates land on that same end. What structure is it?Notice that the newest item is the first item available to leave.
- New ticket holders enter at the back while the earliest holder exits at the front. What structure runs the hallway?Follow arrival time from one end to the other; nobody can jump ahead.