2025 Day 6 Complete!

2025/day06/problem

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+[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.
+
+References
+
+   Visible links
+   1. https://adventofcode.com/
+   2. https://adventofcode.com/2025/about
+   3. https://adventofcode.com/2025/events
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+   6. https://adventofcode.com/2025/auth/logout
+   7. Advent of Code Supporter
+	https://adventofcode.com/2025/support
+   8. https://adventofcode.com/2025
+   9. https://adventofcode.com/2025
+  10. https://adventofcode.com/2025/support
+  11. https://adventofcode.com/2025/sponsors
+  12. https://adventofcode.com/2025/leaderboard/private
+  13. https://adventofcode.com/2025/stats
+  14. https://adventofcode.com/2025/sponsors
+  16. https://adventofcode.com/2021/day/18
+  17. https://adventofcode.com/2025
+  18. https://adventofcode.com/2025/day/6/input