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Minetest - Google CTF 2019
import sqlite3
import struct
from PIL import Image
import zlib
import pygame
import os
from z3 import *
from grid import GRID
from pygame.locals import *
#os.putenv ( "SDL_VIDEODRIVER" , "fbcon" )
DELAY = 0
H = 150
W = 150
offsetW = 0
offsetH = 0
roffsetW = 0
roffsetH = 0
c = sqlite3.connect('real/map.sqlite')
DRAW = True
def getBlockAsInteger(p):
return int64(p[2]*16777216 + p[1]*4096 + p[0])
def int64(u):
while u >= 2**63:
u -= 2**64
while u <= -2**63:
u += 2**64
return u
def getIntegerAsBlock(i):
x = unsignedToSigned(i % 4096, 2048)
i = int((i - x) / 4096)
y = unsignedToSigned(i % 4096, 2048)
i = int((i - y) / 4096)
z = unsignedToSigned(i % 4096, 2048)
return x,y,z
def unsignedToSigned(i, max_positive):
if i < max_positive:
return i
else:
return i - 2*max_positive
start = getBlockAsInteger([0,0,0])
end = getBlockAsInteger([1,1,1900])
# CREATE TABLE `blocks` (`pos` INT NOT NULL PRIMARY KEY,`data` BLOB);
"""
https://github.com/minetest/minetest/blob/master/doc/world_format.txt
u8 version
u8 flags
u16 lighting_complete
u8 content_width
u8 params_width
"""
def parse(blob):
version, flags, lighting_complete,content_width,params_width = struct.unpack("BBHBB", blob[0:6])
#print " ------ Block {}".format(pos)
#print "version:", version
#print "flags:", flags
#print "lighting_complete:", lighting_complete
#print "content_width:", content_width
dec_o = zlib.decompressobj()
(param0, param1, param2) = struct.unpack("8192s4096s4096s" ,dec_o.decompress(blob[6:]))
len(param0)
#print "param0:", param0
#print "param1:", param1
#print "param2:", param2
tail = dec_o.unused_data
dec_o = zlib.decompressobj()
metadata = dec_o.decompress(tail)
#print "metadata:", metadata.encode('hex')
(static_version, static_count,timestamp,name_id_mapping_version,num_name_id_mappings) = struct.unpack(">BHIBH", dec_o.unused_data[0:10])
start = 10
id_to_name ={}
ids = []
for i in range(0, num_name_id_mappings):
(node_id, name_len) = struct.unpack(">HH", dec_o.unused_data[start:start+4])
(name,) = struct.unpack(">{}s".format(name_len), dec_o.unused_data[start+4:start+4+name_len])
id_to_name[node_id] = name.decode('utf8')
ids.append(name.decode('utf8'))
#print node_id, name
start=start+4+name_len
ids.sort()
#print id_to_name
return ids, param0, param1, param2, id_to_name
#pygame.display.flip()
def flip():
global DELAY
DELAY += 1
if DELAY%10==0:
DELAY = 0
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
pygame.display.flip()
GRID = []
for x in range(0,150*16):
GRID.append(['']*200*16)
screen = None
if DRAW:
pygame.init()
screen = pygame.display.set_mode(( 10*16*16 , 10*16*16 ))
#screen = pygame.display.set_mode(( 600 , 600 ))
color = (0, 0, 0)
screen.fill(color)
def node(pos, ids, param0, param1, param2, id_to_name):
global GRID
w = 16
x,y = (pos[0]-roffsetW)*w, (pos[1]-roffsetH)*w
"""if any('air' in s for s in ids):
pygame.draw.rect(screen, (150, 150, 255), pygame.Rect((offsetW*16*16)+x, y, w, w))
if any('default:stone' in s for s in ids):
pygame.draw.rect(screen, (150, 150, 150), pygame.Rect((offsetW*16*16)+x, y, w, w))
if any('mesecons_insulated:insulated' in s for s in ids):
pygame.draw.rect(screen, (0, 0, 255), pygame.Rect((offsetW*16*16)+x+w/2, y, 1, w))
if any('mesecons_extrawires:corner' in s for s in ids):
pygame.draw.rect(screen, (255, 0, 0), pygame.Rect((offsetW*16*16)+x, y+w/2, w/2, 1))
if any('mesecons_extrawires:crossover' in s for s in ids):
pygame.draw.rect(screen, (0, 255, 0), pygame.Rect((offsetW*16*16)+x, y+w/2, w, 1))
pygame.draw.rect(screen, (0, 255, 0), pygame.Rect((offsetW*16*16)+x+w/2, y, 1, w))
if any('mesecons_gates:' in s for s in ids):
pygame.draw.rect(screen, (250, 250, 0), pygame.Rect((offsetW*16*16)+x+2, y+2, w-4, w-4))"""
"""
0 z
1 x
2 -z
3 -x
"""
for i in range(0,16):
for j in range(0,16):
for e in range(2,3):
p0 = param0[j*2+(e*16*2)+i*(16*16*2):j*2+(e*16*2)+i*(16*16*2)+2]
#print p0.encode('hex')
asd = struct.unpack(">H", p0)[0]
asd_ = ord(param0[j+(e*16)+i*(16*16)])
asd1 = ord(param1[j+(e*16)+i*(16*16)])
asd2 = ord(param2[j+(e*16)+i*(16*16)])
if 'mesecons_insulated:insulated' in id_to_name[asd]:
#screen.set_at(((offsetW*16*16)+(x+i)*w, (y+j)*w), col)
if asd2%4 == 0: # top-bottom
GRID[x+i][y+j] = '|'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+(offsetH*16*16), 1, w))
else: #left-right
#print x+i,y+j
GRID[x+i][y+j] = '-'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w, 1))
elif 'mesecons_extrawires:crossover' in id_to_name[asd]:
GRID[x+i][y+j] = '+'
pygame.draw.rect(screen, (150, 150, 150), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w, 1))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+(offsetH*16*16), 1, w))
elif 'mesecons_extrawires:corner' in id_to_name[asd]:
if asd2%4 == 3: # left-bottom
GRID[x+i][y+j] = ','
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w/2, 1))
if asd2%4 == 2: # right-bottom
GRID[x+i][y+j] = '.'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), w/2, 1))
if asd2%4 == 1: # right-top
GRID[x+i][y+j] = '"'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), w/2, 1))
if asd2%4 == 0: # left-top
GRID[x+i][y+j] = '`'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w/2, 1))
elif 'mesecons_extrawires:tjunction' in id_to_name[asd]:
if asd2%4 == 3: # left-right-bottom
GRID[x+i][y+j] = 'T'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w, 1))
if asd2%4 == 2:
print('tjunction not implemented')
exit(0)
pygame.draw.rect(screen, (0, 0, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (0, 0, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16), w/2, 1))
if asd2%4 == 1: # left-right-top
GRID[x+i][y+j] = '^'
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (255, 255, 255), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w, 1))
if asd2%4 == 0:
print('tjunction not implemented')
exit(0)
pygame.draw.rect(screen, (0, 0, 255), pygame.Rect((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+(offsetH*16*16), 1, w/2))
pygame.draw.rect(screen, (0, 0, 255), pygame.Rect((offsetW*16*16)+(x+i)*w, (y+j)*w+w/2+(offsetH*16*16), w/2, 1))
elif 'mesecons_walllever:wall_lever_off' in id_to_name[asd]:
GRID[x+i][y+j] = '@'
print "lever: {}/{}".format(x+i,y+j)
pygame.draw.rect(screen, (250, 50, 50), pygame.Rect((offsetW*16*16)+(x+i)*w+2, (y+j)*w+2+(offsetH*16*16), w-4, w-4))
elif 'mesecons_gates:and' in id_to_name[asd]:
GRID[x+i][y+j] = 'A'
pygame.draw.rect(screen, (200, 200, 200), pygame.Rect((offsetW*16*16)+(x+i)*w+2, (y+j)*w+2+(offsetH*16*16), w-4, w-4))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
elif 'mesecons_gates:or' in id_to_name[asd]:
GRID[x+i][y+j] = 'O'
pygame.draw.rect(screen, (200, 200, 200), pygame.Rect((offsetW*16*16)+(x+i)*w+2, (y+j)*w+2+(offsetH*16*16), w-4, w-4))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+2, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
elif 'mesecons_gates:xor' in id_to_name[asd]:
GRID[x+i][y+j] = 'X'
pygame.draw.rect(screen, (200, 200, 200), pygame.Rect((offsetW*16*16)+(x+i)*w+2, (y+j)*w+2+(offsetH*16*16), w-4, w-4))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+2, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+3, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+4, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+4, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+4, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+5, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
elif 'mesecons_gates:not' in id_to_name[asd]:
GRID[x+i][y+j] = 'N'
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-3+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-2, (y+j)*w+w/2+3+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2-2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+1, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2-1, (y+j)*w+w/2+2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+2, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+3, (y+j)*w+w/2-1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+3, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+3, (y+j)*w+w/2+1+(offsetH*16*16)),(0,0,0))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2+4, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
#pygame.draw.rect(screen, (200, 200, 200), pygame.Rect((offsetW*16*16)+(x+i)*w+2, (y+j)*w+2, w-4, w-4))
screen.set_at(((offsetW*16*16)+(x+i)*w+w/2, (y+j)*w+w/2+(offsetH*16*16)),(0,0,0))
elif 'air' in id_to_name[asd] or 'stone' in id_to_name[asd] or 'ignore' in id_to_name[asd]:
pass
else:
print "{} unkown".format(id_to_name[asd])
#screen.set_at(((offsetW*16*16)+x,y+(offsetH*16*16)),(0,0,0))
if DRAW:
for x in range(roffsetH,roffsetH+H):
#print x,'/',H
for z in range(roffsetW,roffsetW+W):
#print x,'/',H,' | ',z,'/',W
for a in c.execute('SELECT * from blocks where pos = {}'.format(getBlockAsInteger([x,0,z]))):
x,y,z = getIntegerAsBlock(a[0])
ids, param0, param1, param2, id_to_name = parse(a[1])
#draw((z+2, x+2), ids, param2, id_to_name,2)
node((z, x), ids, param0,param1,param2, id_to_name)
#pygame.display.update((x,z,x+1,z+1))
# if x%1 == 0:
# flip()
flip()
print("done drawing. save")
#pygame.image.save(screen, 'map_{}_{}.png'.format(roffsetW, roffsetH))
with open('grid.py', 'w') as f:
f.write(str(GRID))
exit(0) # remove me
if DRAW:
while True:
flip()
from z3 import *
from grid import GRID
# pip install z3-solver
TRACES = 0
VISITED = {}
def trace(pos, d):
global TRACES
global VISITED
TRACES += 1
x,y = pos
while True:
c = GRID[x][y]
if c == '-' and d == 'right':
x+=1
elif c == '-' and d == 'left': # <----
x-=1
elif c == '|' and d == 'up':
y-=1
elif c == '|' and d == 'down':
y+=1
elif c == 'A' and d == 'down':
return (x,y+1),'AND_{}_{}'.format(x,y+1)
elif c == 'A' and d == 'left': # <----
if 'AND_{}_{}'.format(x,y+1) not in VISITED:
VISITED['AND_{}_{}'.format(x,y+1)] = simplify(And(trace((x,y+1),'down'), trace((x,y-1),'up')))
return VISITED['AND_{}_{}'.format(x,y+1)]
elif c == 'A' and d == 'up':
return (x,y-1),'AND_{}_{}'.format(x,y-1)
elif c == 'X' and d == 'down':
return (x,y+1),'XOR_{}_{}'.format(x,y+1)
elif c == 'X' and d == 'up':
return (x,y-1),'XOR_{}_{}'.format(x,y-1)
elif c == 'X' and d == 'left': # <----
if 'XOR_{}_{}'.format(x,y+1) not in VISITED:
VISITED['XOR_{}_{}'.format(x,y+1)] = simplify(Xor(trace((x,y+1),'down'), trace((x,y-1),'up')))
return VISITED['XOR_{}_{}'.format(x,y+1)]
elif c == 'O' and d == 'left': # <----
if 'OR_{}_{}'.format(x,y+1) not in VISITED:
VISITED['OR_{}_{}'.format(x,y+1)] = simplify(Or(trace((x,y+1),'down'), trace((x,y-1),'up')))
return VISITED['OR_{}_{}'.format(x,y+1)]
elif c == 'O' and d == 'down':
return (x,y+1),'OR_{}_{}'.format(x,y+1)
elif c == 'O' and d == 'up':
return (x,y-1),'OR_{}_{}'.format(x,y-1)
elif c == 'N' and d == 'right':
return (x+1,y),'NOT_{}_{}'.format(x+1,y)
elif c == 'N' and d == 'left': # <---- # <----
if 'NOT_{}_{}'.format(x,y+1) not in VISITED:
VISITED['NOT_{}_{}'.format(x,y+1)] =simplify(Not(trace((x-1,y), 'left')))
return VISITED['NOT_{}_{}'.format(x,y+1)]
elif c == '+' and d == 'right':
x+=1
elif c == '+' and d == 'left': # <----
x-=1
elif c == '+' and d == 'up':
y-=1
elif c == '+' and d == 'down':
y+=1
elif c == '.' and d == 'up':
x+=1
d = 'right'
elif c == '.' and d == 'left': # <----
y+=1
d = 'down'
elif c == '`' and d == 'right':
y-=1
d = 'up'
elif c == '`' and d == 'down':
x-=1
d = 'left'
elif c == ',' and d == 'right':
y+=1
d = 'down'
elif c == ',' and d == 'up':
x-=1
d = 'left'
elif c == '"' and d == 'right':
y-=1
d = 'up'
elif c == '"' and d == 'left': # <----
y-=1
d = 'up'
elif c == '"' and d == 'down':
x+=1
d = 'right'
elif c == '^' and d == 'left': # <----
d = 'left'
x -= 1
elif c == '^' and d == 'down':
d = 'left'
x -= 1
elif c == '^' and d == 'right':
return trace((x+1,y), 'right'), trace((x,y-1), 'up')
elif c == 'T' and d == 'right':
return trace((x+1,y), 'right'), trace((x,y+1), 'down')
elif c == 'T' and d == 'up':
d = 'left'
x -= 1
elif c == 'T' and d == 'left': # <----
d = 'left'
x -= 1
elif c == '@': # input lever
d = 'left'
x -= 1
return Bool('input_{}'.format(y))
else:
print("ERROR ({}/{}) {}: {}".format(x,y,d,c))
exit(0)
print("[*] tracing the network")
circuit = trace((1937,1), 'left')
print("[*] circuit done")
print(circuit)
print("[*] solving it")
solved = solve(circuit==True)
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