121 lines
2.8 KiB
Python
121 lines
2.8 KiB
Python
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from intcode import parse, emulator, REPL
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import re
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N = 'north'
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S = 'south'
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E = 'east'
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W = 'west'
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back = {N : S, S : N, W : E, E : W}
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def add_vec(xy, d):
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x, y = xy
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if d == N:
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return (x, y+1)
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if d == S:
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return (x, y-1)
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if d == W:
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return (x-1, y)
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if d == E:
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return (x+1, y)
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class Room:
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def __init__(self, mssg, path):
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blocks = mssg.strip().split("\n\n")
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head_str = blocks[0]
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door_str = blocks[1]
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item_str = '\n'.join(blocks[2:])
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self.name = re.findall('=+ ([^=]+) =+', head_str)[0]
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self.description = re.findall(r'=\n([\s\S]+)', head_str)[-1].rstrip()
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self.doors = re.findall(r'- (\w+)\n?', door_str)
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self.items = re.findall(r'- (.+)\n?', item_str)
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self.path = path
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def __eq__(self, other):
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return self.name == other.name
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def __repr__(self):
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head = "== {} ==\n{}".format(self.name, self.description)
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doors = "Doors here lead:\n- {}".format("\n- ".join(self.doors))
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items = "" if self.items == [] else "\n\nItems here:\n- {}".format("\n- ".join(self.items))
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path = " -> ".join(self.path)
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return "{}\n\n{}{}\n{}".format(head, doors, items, path)
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def encode(s):
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return map(ord, s + '\n')
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def decode(lst):
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return ''.join(map(chr, lst))
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def goto_room(repl, room):
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for d in room.path:
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repl.write(d)
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next(repl)
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def try_item(repl, item):
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if item in ("infinite loop", "giant electromagnet"):
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return False
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repl = repl.copy()
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repl.write("take " + item)
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next(repl)
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try:
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repl.write('')
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next(repl)
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return True
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except StopIteration:
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return False
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def map_ship(repl):
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rooms = []
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items = []
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def aux(path):
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s = next(repl)
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try:
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room = Room(s, path)
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except:
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return
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if room in rooms:
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return
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rooms.append(room)
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for item in room.items:
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if not try_item(repl, item):
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continue
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repl.write("take " + item)
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next(repl)
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items.append(item)
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for d in room.doors:
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repl.write(d)
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aux(path + [d])
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repl.write(back[d])
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next(repl)
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aux([])
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return rooms, items
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def preproc(puzzle_input):
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prog = parse(puzzle_input)
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emul = emulator(prog)
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repl = REPL(emul, decode=decode, encode=encode)
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rooms, items = map_ship(repl)
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checkpoint = list(filter(lambda room : room.name == "Security Checkpoint", rooms))[0]
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goto_room(repl, checkpoint)
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return repl
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def partI(repl):
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for item in ["coin", "mutex", "astronaut ice cream", "dehydrated water"]:
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repl.write("drop " + item)
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next(repl)
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repl.write("north")
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s = next(repl)
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return re.findall(r'\d+', s)[0]
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def partII(_):
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return "No solution"
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