Reflowed problems and added solutions

2016/day12/problem

@@ -2,31 +2,40 @@ Advent of Code
 
 --- Day 12: Leonardo's Monorail ---
 
-   You finally reach the top floor of this building: a garden with a slanted glass ceiling. Looks like there are no more
-   stars to be had.
+   You finally reach the top floor of this building: a garden with a slanted
+   glass ceiling. Looks like there are no more stars to be had.
 
-   While sitting on a nearby bench amidst some tiger lilies, you manage to decrypt some of the files you extracted from
-   the servers downstairs.
+   While sitting on a nearby bench amidst some tiger lilies, you manage to
+   decrypt some of the files you extracted from the servers downstairs.
 
-   According to these documents, Easter Bunny HQ isn't just this building - it's a collection of buildings in the nearby
-   area. They're all connected by a local monorail, and there's another building not far from here! Unfortunately, being
-   night, the monorail is currently not operating.
+   According to these documents, Easter Bunny HQ isn't just this building -
+   it's a collection of buildings in the nearby area. They're all connected by
+   a local monorail, and there's another building not far from here!
+   Unfortunately, being night, the monorail is currently not operating.
 
-   You remotely connect to the monorail control systems and discover that the boot sequence expects a password. The
-   password-checking logic (your puzzle input) is easy to extract, but the code it uses is strange: it's assembunny code
-   designed for the new computer you just assembled. You'll have to execute the code and get the password.
+   You remotely connect to the monorail control systems and discover that the
+   boot sequence expects a password. The password-checking logic (your puzzle
+   input) is easy to extract, but the code it uses is strange: it's assembunny
+   code designed for the new computer you just assembled. You'll have to
+   execute the code and get the password.
 
-   The assembunny code you've extracted operates on four registers (a, b, c, and d) that start at 0 and can hold any
-   integer. However, it seems to make use of only a few instructions:
+   The assembunny code you've extracted operates on four registers (a, b, c,
+   and d) that start at 0 and can hold any integer. However, it seems to make
+   use of only a few instructions:
+
+     • cpy x y copies x (either an integer or the value of a register) into
+       register y.
 
-     • cpy x y copies x (either an integer or the value of a register) into register y.
      • inc x increases the value of register x by one.
-     • dec x decreases the value of register x by one.
-     • jnz x y jumps to an instruction y away (positive means forward; negative means backward), but only if x is not
-       zero.
 
-   The jnz instruction moves relative to itself: an offset of -1 would continue at the previous instruction, while an
-   offset of 2 would skip over the next instruction.
+     • dec x decreases the value of register x by one.
+
+     • jnz x y jumps to an instruction y away (positive means forward; negative
+       means backward), but only if x is not zero.
+
+   The jnz instruction moves relative to itself: an offset of -1 would continue
+   at the previous instruction, while an offset of 2 would skip over the next
+   instruction.
 
    For example:
 
@@ -37,22 +46,26 @@ Advent of Code
  jnz a 2
  dec a
 
-   The above code would set register a to 41, increase its value by 2, decrease its value by 1, and then skip the last
-   dec a (because a is not zero, so the jnz a 2 skips it), leaving register a at 42. When you move past the last
+   The above code would set register a to 41, increase its value by 2, decrease
+   its value by 1, and then skip the last dec a (because a is not zero, so the
+   jnz a 2 skips it), leaving register a at 42. When you move past the last
    instruction, the program halts.
 
-   After executing the assembunny code in your puzzle input, what value is left in register a?
+   After executing the assembunny code in your puzzle input, what value is left
+   in register a?
 
-   Your puzzle answer was __________.
+   Your puzzle answer was 318077.
 
 --- Part Two ---
 
-   As you head down the fire escape to the monorail, you notice it didn't start; register c needs to be initialized to
-   the position of the ignition key.
+   As you head down the fire escape to the monorail, you notice it didn't
+   start; register c needs to be initialized to the position of the ignition
+   key.
 
-   If you instead initialize register c to be 1, what value is now left in register a?
+   If you instead initialize register c to be 1, what value is now left in
+   register a?
 
-   Your puzzle answer was ___________.
+   Your puzzle answer was 9227731.
 
 References