Thanks to this lecture, I was able to clearly learn the concept of DFS. As I look back on the time I spent studying on my own, I feel regret that I didn't have such a great teacher to guide me earlier, and I am grateful that I can learn properly now. This is a very precious lecture. Just looking at how you deliver the lecture step by step and easily, I think you are quite capable, so I think you must be very busy, but I hope you will make more advanced lectures on other algorithm concepts soon!! I will wait eagerly😊😊^_😭 Thank you again for taking the time to create such a high-quality lecture~~!!