1739. Building Boxes

You have a cubic storeroom where the width, length, and height of the room are all equal to n units. You are asked to place n boxes in this room where each box is a cube of unit side length. There are however some rules to placing the boxes: - You can place the boxes anywhere on the floor. - If box x is placed on top of the box y, then each side of the four vertical sides of the box y must eithe