[Classiccity-pm] Greatest number

[Joshua McAdams]

> Or should I read everything in an array and then sort the array

I would think that if file size might be an issue, then you'd probably
want to stick with what you are doing now and not load the entire
thing into memory.

Just to be sure, you know that you're doing a string compare on the
numbers instead of a numeric compare?  Probably not too big of a deal
and maybe even what you intended... just thought I'd call it out.