Reorder days into src

6 files changed, 2358 insertions, 0 deletions

diff --git a/src/17/.gitignore b/src/17/.gitignore
new file mode 100644
index 0000000..53752db
--- /dev/null
+++ b/src/17/.gitignore
@@ -0,0 +1 @@
+output
diff --git a/src/17/input b/src/17/input
new file mode 100644
index 0000000..c383645
--- /dev/null
+++ b/src/17/input
@@ -0,0 +1,1884 @@
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+x=557, y=1412..1431

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+x=537, y=1112..1126

+x=359, y=699..713

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+x=567, y=920..929

+x=543, y=298..303

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+x=552, y=446..455

+x=609, y=1553..1556

+x=548, y=383..396

+x=369, y=689..701

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+x=322, y=1593..1604

+x=505, y=1692..1697

+x=346, y=1405..1414

+x=431, y=972..974

+y=1025, x=516..521

+x=591, y=925..934

+x=484, y=867..881

+y=721, x=518..520

+y=1356, x=614..618

+x=456, y=1503..1525

+y=524, x=332..335

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+x=371, y=370..376

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+x=422, y=1010..1021

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+x=426, y=593..601

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+x=362, y=861..875

+x=610, y=1040..1061

+x=310, y=1632..1653

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+x=576, y=895..902

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+x=394, y=212..229

+x=373, y=463..466

+y=97, x=386..405

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diff --git a/src/17/part1 b/src/17/part1
new file mode 100644
index 0000000..ed0d74c
--- /dev/null
+++ b/src/17/part1
@@ -0,0 +1,177 @@
+--- Day 17: Reservoir Research ---
+
+You arrive in the year 18. If it weren't for the coat you got in 1018, you would be very cold: the
+North Pole base hasn't even been constructed.
+
+Rather, it hasn't been constructed yet.  The Elves are making a little progress, but there's not a
+lot of liquid water in this climate, so they're getting very dehydrated.  Maybe there's more
+underground?
+
+You scan a two-dimensional vertical slice of the ground nearby and discover that it is mostly
+sand with veins of clay.  The scan only provides data with a granularity of square meters, but it
+should be good enough to determine how much water is trapped there. In the scan, x represents the
+distance to the right, and y represents the distance down. There is also a spring of water near the
+surface at x=500, y=0. The scan identifies which square meters are clay (your puzzle input).
+
+For example, suppose your scan shows the following veins of clay:
+
+x=495, y=2..7
+y=7, x=495..501
+x=501, y=3..7
+x=498, y=2..4
+x=506, y=1..2
+x=498, y=10..13
+x=504, y=10..13
+y=13, x=498..504
+
+Rendering clay as #, sand as ., and the water spring as +, and with x increasing to the right and y
+increasing downward, this becomes:
+
+   44444455555555
+   99999900000000
+   45678901234567
+ 0 ......+.......
+ 1 ............#.
+ 2 .#..#.......#.
+ 3 .#..#..#......
+ 4 .#..#..#......
+ 5 .#.....#......
+ 6 .#.....#......
+ 7 .#######......
+ 8 ..............
+ 9 ..............
+10 ....#.....#...
+11 ....#.....#...
+12 ....#.....#...
+13 ....#######...
+
+The spring of water will produce water forever. Water can move through sand, but is blocked by clay.
+Water always moves down when possible, and spreads to the left and right otherwise, filling space
+that has clay on both sides and falling out otherwise.
+
+For example, if five squares of water are created, they will flow downward until they reach the clay
+and settle there. Water that has come to rest is shown here as ~, while sand through which water has
+passed (but which is now dry again) is shown as |:
+
+......+.......
+......|.....#.
+.#..#.|.....#.
+.#..#.|#......
+.#..#.|#......
+.#....|#......
+.#~~~~~#......
+.#######......
+..............
+..............
+....#.....#...
+....#.....#...
+....#.....#...
+....#######...
+
+Two squares of water can't occupy the same location.  If another five squares of water are created,
+they will settle on the first five, filling the clay reservoir a little more:
+
+......+.......
+......|.....#.
+.#..#.|.....#.
+.#..#.|#......
+.#..#.|#......
+.#~~~~~#......
+.#~~~~~#......
+.#######......
+..............
+..............
+....#.....#...
+....#.....#...
+....#.....#...
+....#######...
+
+Water pressure does not apply in this scenario. If another four squares of water are created, they
+will stay on the right side of the barrier, and no water will reach the left side:
+
+......+.......
+......|.....#.
+.#..#.|.....#.
+.#..#~~#......
+.#..#~~#......
+.#~~~~~#......
+.#~~~~~#......
+.#######......
+..............
+..............
+....#.....#...
+....#.....#...
+....#.....#...
+....#######...
+
+At this point, the top reservoir overflows. While water can reach the tiles above the surface of the
+water, it cannot settle there, and so the next five squares of water settle like this:
+
+......+.......
+......|.....#.
+.#..#||||...#.
+.#..#~~#|.....
+.#..#~~#|.....
+.#~~~~~#|.....
+.#~~~~~#|.....
+.#######|.....
+........|.....
+........|.....
+....#...|.#...
+....#...|.#...
+....#~~~~~#...
+....#######...
+
+Note especially the leftmost |: the new squares of water can reach this tile, but cannot stop there.
+ Instead, eventually, they all fall to the right and settle in the reservoir below.
+
+After 10 more squares of water, the bottom reservoir is also full:
+
+......+.......
+......|.....#.
+.#..#||||...#.
+.#..#~~#|.....
+.#..#~~#|.....
+.#~~~~~#|.....
+.#~~~~~#|.....
+.#######|.....
+........|.....
+........|.....
+....#~~~~~#...
+....#~~~~~#...
+....#~~~~~#...
+....#######...
+
+Finally, while there is nowhere left for the water to settle, it can reach a few more tiles before
+overflowing beyond the bottom of the scanned data:
+
+......+.......    (line not counted: above minimum y value)
+......|.....#.
+.#..#||||...#.
+.#..#~~#|.....
+.#..#~~#|.....
+.#~~~~~#|.....
+.#~~~~~#|.....
+.#######|.....
+........|.....
+...|||||||||..
+...|#~~~~~#|..
+...|#~~~~~#|..
+...|#~~~~~#|..
+...|#######|..
+...|.......|..    (line not counted: below maximum y value)
+...|.......|..    (line not counted: below maximum y value)
+...|.......|..    (line not counted: below maximum y value)
+
+How many tiles can be reached by the water?  To prevent counting forever, ignore tiles with a y
+coordinate smaller than the smallest y coordinate in your scan data or larger than the largest one.
+Any x coordinate is valid. In this example, the lowest y coordinate given is 1, and the highest is
+13, causing the water spring (in row 0) and the water falling off the bottom of the render (in rows
+14 through infinity) to be ignored.
+
+So, in the example above, counting both water at rest (~) and other sand tiles the water can
+hypothetically reach (|), the total number of tiles the water can reach is 57.
+
+How many tiles can the water reach within the range of y values in your scan?
+
+
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?
+
+
diff --git a/src/17/solve.py b/src/17/solve.py
new file mode 100644
index 0000000..c6454f3
--- /dev/null
+++ b/src/17/solve.py
@@ -0,0 +1,183 @@
+import sys

+sys.path.append("../common")

+import aoc

+

+def parse_line(l):

+    s = l.split(", ")

+    if s[0].startswith("y="):

+        s = s[::-1]

+

+    res = [[int(x) for x in v.split("=")[1].split("..")] for v in s]

+    return res

+

+constraints = [parse_line(l) for l in aoc.data.split("\n")]

+

+xmin = min(c[0][0] for c in constraints)-1

+xmax = max(c[0][-1] for c in constraints)+1

+ymin = min(c[1][0] for c in constraints)

+ymax = max(c[1][-1] for c in constraints)

+xdif = xmax - xmin + 1

+ydif = ymax - ymin + 1

+

+vmap = [[0 for x in range(xdif)] for y in range(ydif)]

+

+def set_map(x, y, v):

+    global vmap

+    if y < ymin or y > ymax or x < xmin or x > xmax:

+        return

+    vmap[y-ymin][x-xmin] = v

+

+def get_map(x, y):

+    global vmap

+    if x > xmax or x < xmin:

+        return 1

+    elif y > ymax:

+        return 0

+    return vmap[y-ymin][x-xmin]

+

+def drawWall(c):

+    if len(c[0]) == 1:

+        for y in range(c[1][0], c[1][1] + 1):

+            set_map(c[0][0], y, 1)

+    else:

+        for x in range(c[0][0], c[0][1] + 1):

+            set_map(x, c[1][0], 1)

+

+for c in constraints:

+    drawWall(c)

+

+spring = (500, 0)

+

+

+### SETUP END

+

+

+def interpretChar(v):

+    chars = [".", "#", "|", "~"]

+    return chars[v]

+

+def drawMap():

+    for y in range(ydif):

+        aoc.debug("".join([interpretChar(v) for v in vmap[y]]))

+

+def fwriteMap():

+    f = open("output","w+")

+    for y in range(ydif):

+        f.write("".join([interpretChar(v) for v in vmap[y]])+"\n")

+    f.close()

+

+def isstatic(p):

+    return get_map(p[0], p[1]) in (1, 3)

+

+def isfree(p):

+    return get_map(p[0], p[1]) == 0

+

+def move(p):

+    x = p[0]

+    y = p[1]

+    if isfree((x, y+1)):

+        return (x, y+1)

+    onblock = isstatic((x, y+1))

+    if not onblock:

+        return (x,y)

+    npos = [(x + dir, y) for dir in [-1, 1]]

+    npos = [np for np in npos if isfree(np) and onblock]

+    if len(npos) > 1:

+        return npos

+    elif len(npos) == 1:

+        return npos[0]

+    return (x, y)

+

+def fillfloor(p):

+    onblock = True

+    isblock = False

+    x = p[0]

+    while onblock and not isblock and x >= xmin:

+        x -= 1

+        isblock = isstatic((x, p[1]))

+        onblock = isstatic((x, p[1]+1))

+    if not isblock:

+        return None # edge

+    lx = x+1

+

+    onblock = True

+    isblock = False

+    x = p[0]

+    while onblock and not isblock and x <= xmax:

+        x += 1

+        isblock = isstatic((x, p[1]))

+        onblock = isstatic((x, p[1]+1))

+    if not isblock:

+        return None

+    rx = x-1

+

+    return [(i, p[1]) for i in range(lx, rx+1)]

+

+def count_w_flowing():

+    water = 0

+    for y in range(ymin, ymax+1):

+        for x in range(xmin, xmax+1):

+            if get_map(x,y) == 2:

+                water += 1

+    return water

+

+def count_w_static():

+    water = 0

+    for y in range(ymin, ymax+1):

+        for x in range(xmin, xmax+1):

+            if get_map(x,y) == 3:

+                water += 1

+    return water

+

+def simulate():

+    heads = [spring]

+    while len(heads) > 0:

+        cp = heads[-1]

+        if isstatic((cp[0], cp[1]+1)):

+            # solid below => expand

+            res = fillfloor(cp)

+            if res:

+                for p in res:

+                    set_map(p[0], p[1], 3)

+                nhead = None

+                for x in range(res[0][0], res[-1][0]+1):

+                    np = (x, res[0][1]-1)

+                    if get_map(np[0], np[1]) == 2:

+                        nhead = np

+                        break

+                if nhead == None: # head got trapped

+                    heads.pop()

+                else:

+                    heads[-1] = nhead

+                continue

+

+        res = move(cp)

+        if type(res[0]) == tuple:

+            heads.pop()

+            heads += res

+            for p in res:

+                set_map(p[0], p[1], 2)

+        else:

+            if res != cp:

+                if res[1] <= ymax:

+                    set_map(res[0], res[1], 2)

+                    heads[-1] = res

+                else:

+                    heads.pop()

+            else:

+                heads.pop()

+

+        if aoc.debug_lvl:

+            aoc.debug(heads)

+            input()

+            fwriteMap()

+

+def solve1(args):

+    simulate()

+    return count_w_flowing() + count_w_static()

+

+def solve2(args):

+    simulate()

+    return count_w_static()

+

+aoc.run(solve1, solve2, sols=[39557, 32984])

diff --git a/src/17/test1 b/src/17/test1
new file mode 100644
index 0000000..293b5af
--- /dev/null
+++ b/src/17/test1
@@ -0,0 +1,8 @@
+x=495, y=2..7
+y=7, x=495..501
+x=501, y=3..7
+x=498, y=2..4
+x=506, y=1..2
+x=498, y=10..13
+x=504, y=10..13
+y=13, x=498..504