If I want to copy code from another student, I can always cover my tracks by:

• Reorder the methods in the file so they look different
• Reformat the code to use my own indentation style
• Rewriting the comments in my own words
• Changing all the variable and method names to my own names
• It doesn't matter--there's really only one way to solve programs this simple, so all our solutions are bound to be the same