I was often exposed to the C language in college, but I was worried that I wouldn't be able to solve the algorithm because I wasn't familiar with it. However, my worries disappeared after I solved the problems by looking at the textbook that only included the key usage methods. First of all, it's good that there are many fun parts in the middle of the concept lecture, so it doesn't get boring. I think the characteristic of Teacher Bigdol's lecture is that the explanation is not complicated and only tells the key points. However, in the end, I think the most important thing for coding tests is that you solve them consistently. I think that's also an advantage because you can solve high-quality problems that Teacher Bigdol has carefully selected.