I prepared for the coding test using JavaScript. Studying the coding test alone was too much, so I looked for a lecture and ended up taking Teacher Bigdol's lecture! I was scared of changing the coding language, but it wasn't as hard as I thought! If you're worried about the language like me, try it!! My perspective on the problem has definitely changed compared to when I did it alone. I learned how to look at the problem, and the explanation of the data structure is clear and fun! The price was a bit burdensome, but I think it's worth the investment!!