Xiao Ming: Professor Smith, I have a question regarding the coding assignment you gave us.
Professor Smith: Sure, what's the issue?
Xiao Ming: I'm having trouble with the algorithm. I'm not sure if I'm doing it the right way.
Professor Smith: What's the specific problem you're trying to solve?
Xiao Ming: It's related to encryption and decryption.
Professor Smith: Okay. Let's take a look at your code. Can you share your screen and walk me through your thought process?请总结以上对话的主要内容。
Xiao Ming seeks help on a coding assignment related to encryption and decryption from Professor Smith, who reviews his code and provides guidance on solving the problem.