Reorder days into src

1 files changed, 105 insertions, 0 deletions

diff --git a/src/17/part2 b/src/17/part2
new file mode 100644
index 0000000..a0801b8
--- /dev/null
+++ b/src/17/part2
@@ -0,0 +1,105 @@
+--- Part Two ---
+
+Now for the tricky part: notifying all the other robots about the solar flare.  The vacuum robot can
+do this automatically if it gets into range of a robot. However, you can't see the other robots on
+the camera, so you need to be thorough instead: you need to make the vacuum robot visit every part
+of the scaffold at least once.
+
+The vacuum robot normally wanders randomly, but there isn't time for that today.  Instead, you can
+override its movement logic with new rules.
+
+Force the vacuum robot to wake up by changing the value in your ASCII program at address 0 from 1 to
+2. When you do this, you will be automatically prompted for the new movement rules that the vacuum
+robot should use. The ASCII program will use input instructions to receive them, but they need to be
+provided as ASCII code; end each line of logic with a single newline, ASCII code 10.
+
+First, you will be prompted for the main movement routine.  The main routine may only call the
+movement functions: A, B, or C. Supply the movement functions to use as ASCII text, separating them
+with commas (,, ASCII code 44), and ending the list with a newline (ASCII code 10). For example, to
+call A twice, then alternate between B and C three times, provide the string A,A,B,C,B,C,B,C and
+then a newline.
+
+Then, you will be prompted for each movement function. Movement functions may use L to turn
+left, R to turn right, or a number to move forward that many units.  Movement functions may not call
+other movement functions.  Again, separate the actions with commas and end the list with a newline. 
+For example, to move forward 10 units, turn left, move forward 8 units, turn right, and finally move
+forward 6 units, provide the string 10,L,8,R,6 and then a newline.
+
+Finally, you will be asked whether you want to see a continuous video feed; provide either y or n
+and a newline.  Enabling the continuous video feed can help you see what's going on, but it also
+requires a significant amount of processing power, and may even cause your Intcode computer to
+overheat.
+
+Due to the limited amount of memory in the vacuum robot, the ASCII definitions of the main routine
+and the movement functions may each contain at most 20 characters, not counting the newline.
+
+For example, consider the following camera feed:
+
+#######...#####
+#.....#...#...#
+#.....#...#...#
+......#...#...#
+......#...###.#
+......#.....#.#
+^########...#.#
+......#.#...#.#
+......#########
+........#...#..
+....#########..
+....#...#......
+....#...#......
+....#...#......
+....#####......
+
+In order for the vacuum robot to visit every part of the scaffold at least once, one path it could
+take is:
+
+R,8,R,8,R,4,R,4,R,8,L,6,L,2,R,4,R,4,R,8,R,8,R,8,L,6,L,2
+Without the memory limit, you could just supply this whole string to function A and have the main
+routine call A once.  However, you'll need to split it into smaller parts.
+
+One approach is:
+
+
+ - Main routine: A,B,C,B,A,C(ASCII input: 65, 44, 66, 44, 67, 44, 66, 44, 65, 44, 67, 10)
+
+ - Function A:   R,8,R,8(ASCII input: 82, 44, 56, 44, 82, 44, 56, 10)
+
+ - Function B:   R,4,R,4,R,8(ASCII input: 82, 44, 52, 44, 82, 44, 52, 44, 82, 44, 56, 10)
+
+ - Function C:   L,6,L,2(ASCII input: 76, 44, 54, 44, 76, 44, 50, 10)
+
+
+Visually, this would break the desired path into the following parts:
+
+A,        B,            C,        B,            A,        C
+R,8,R,8,  R,4,R,4,R,8,  L,6,L,2,  R,4,R,4,R,8,  R,8,R,8,  L,6,L,2
+
+CCCCCCA...BBBBB
+C.....A...B...B
+C.....A...B...B
+......A...B...B
+......A...CCC.B
+......A.....C.B
+^AAAAAAAA...C.B
+......A.A...C.B
+......AAAAAA#AB
+........A...C..
+....BBBB#BBBB..
+....B...A......
+....B...A......
+....B...A......
+....BBBBA......
+
+Of course, the scaffolding outside your ship is much more complex.
+
+As the vacuum robot finds other robots and notifies them of the impending solar flare, it also can't
+help but leave them squeaky clean, collecting any space dust it finds. Once it finishes the
+programmed set of movements, assuming it hasn't drifted off into space, the cleaning robot will
+return to its docking station and report the amount of space dust it collected as a large, non-ASCII
+value in a single output instruction.
+
+After visiting every part of the scaffold at least once, how much dust does the vacuum robot report
+it has collected?
+
+