[L10] what does r"(\d)(\1*)" mean??

[고혁인]

please help me 

I can't sleep 

[jro...@gmail.com]

That's not how I solved it.  I'm guessing you looked up someone else's solution.  Look at the documentation for regular expressions in python.  The form r"...." indicates that you're specifying a regular expression inside the quotes.

I'm guessing what you found is probably part of an extremely compact solution.  However, unless you're a whiz with regular expressions, I would solve it first with simpler, more verbose code.

You don't need any code to figure out the pattern.  You just need code to figure out the 30th term, and find it's length after you've solved the pattern.