See: https://adventofcode.com/2022/day/1
** Part 1
*** Purpose
Given a list of numbers:

#+begin_example
1000
2000
3000

4000

5000
6000

7000
8000
9000

10000
#+end_example

Calculate the "group" with the largest sum, and report that sum.

*** Method

This sounds easy. Split the input into a list of lists:

#+begin_example
'((1000
   2000
   3000)
  (4000
   5000
   6000)
  (7000
   8000
   9000)
  (10000))
#+end_example

Sum up each sub-list, sort it, and take the CAR!

** Part 2
*** Purpose
The next part simply asks us to sum the top 3 numbers. So quick and easy, I've just provided the mechanisms for summing X highest numbers.