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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])
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