There is a cube that is on the $(x, y, z)$ coordinates. How do I construct a systematic way to go from $(0,0,0)$ to $(3,3,3)$? Which subject should I study for this question?
Please help me! I'm trying to solve this question but at the end of my try I found myself counting all the ways one by one.
Hint: You have $9$ steps to take in total, and $3$ need to be in the $+x$ direction, $3$ need to be in the $+y$ direction and $3$ need to be in the $+z$ direction, but you can choose to take these steps in any order. Does this suggest anything?