Questions for Oct. 20-21

I saw these questions in other places and think it may be worth a try. 
Question 1:

Given a finite set of unique numbers, find all the runs in the set. 
Runs are 1 or more consecutive numbers.
That is, given {1,59,12,43,4,58,5,13,46,3,6}, 
the output should be: {1}, {3,4,5,6}, {12,13}, {43}, {46},{58,59}.
Note that the size of the set may be very large.

If you think it's too easy, you can take a look at the discussion here: 
http://ayende.com/blog/163394/new-interview-question
Or you may want to think a little bit before clicking it.

Question 2:

You're given a modified text editor and there are only three operations
you can take: select all, copy and paste. Initially there's only one letter 
in the editable area. If you can take only N operations, compute the largest
number of letters you can get finally.

The input is N and output should be the largest number of letters.