[1]Advent of Code
   br0xen [7](AoC++) 12*

--- Day 6: Trash Compactor ---

   After helping the Elves in the kitchen, you were taking a break and
   helping them re-enact a movie scene when you over-enthusiastically jumped
   into the garbage chute!

   A brief fall later, you find yourself in a garbage smasher. Unfortunately,
   the door's been magnetically sealed.

   As you try to find a way out, you are approached by a family of
   cephalopods! They're pretty sure they can get the door open, but it will
   take some time. While you wait, they're curious if you can help the
   youngest cephalopod with her [16]math homework.

   Cephalopod math doesn't look that different from normal math. The math
   worksheet (your puzzle input) consists of a list of problems; each problem
   has a group of numbers that need to be either added (+) or multiplied (*)
   together.

   However, the problems are arranged a little strangely; they seem to be
   presented next to each other in a very long horizontal list. For example:

 123 328  51 64
  45 64  387 23
   6 98  215 314
 *   +   *   +

   Each problem's numbers are arranged vertically; at the bottom of the
   problem is the symbol for the operation that needs to be performed.
   Problems are separated by a full column of only spaces. The left/right
   alignment of numbers within each problem can be ignored.

   So, this worksheet contains four problems:

     • 123 * 45 * 6 = 33210
     • 328 + 64 + 98 = 490
     • 51 * 387 * 215 = 4243455
     • 64 + 23 + 314 = 401

   To check their work, cephalopod students are given the grand total of
   adding together all of the answers to the individual problems. In this
   worksheet, the grand total is 33210 + 490 + 4243455 + 401 = 4277556.

   Of course, the actual worksheet is much wider. You'll need to make sure to
   unroll it completely so that you can read the problems clearly.

   Solve the problems on the math worksheet. What is the grand total found by
   adding together all of the answers to the individual problems?

   Your puzzle answer was 6295830249262.

--- Part Two ---

   The big cephalopods come back to check on how things are going. When they
   see that your grand total doesn't match the one expected by the worksheet,
   they realize they forgot to explain how to read cephalopod math.

   Cephalopod math is written right-to-left in columns. Each number is given
   in its own column, with the most significant digit at the top and the
   least significant digit at the bottom. (Problems are still separated with
   a column consisting only of spaces, and the symbol at the bottom of the
   problem is still the operator to use.)

   Here's the example worksheet again:

 123 328  51 64
  45 64  387 23
   6 98  215 314
 *   +   *   +

   Reading the problems right-to-left one column at a time, the problems are
   now quite different:

     • The rightmost problem is 4 + 431 + 623 = 1058
     • The second problem from the right is 175 * 581 * 32 = 3253600
     • The third problem from the right is 8 + 248 + 369 = 625
     • Finally, the leftmost problem is 356 * 24 * 1 = 8544

   Now, the grand total is 1058 + 3253600 + 625 + 8544 = 3263827.

   Solve the problems on the math worksheet again. What is the grand total
   found by adding together all of the answers to the individual problems?

   Your puzzle answer was 9194682052782.

   Both parts of this puzzle are complete! They provide two gold stars: **

   At this point, you should [17]return to your Advent calendar and try
   another puzzle.

   If you still want to see it, you can [18]get your puzzle input.

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