83 lines
3.0 KiB
Python
83 lines
3.0 KiB
Python
from sys import argv
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from re import finditer
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from copy import deepcopy
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class Monkey:
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monkeys = []
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common_divisor = 1
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worry_level_decrease = 1
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def __init__(self, start_items:list[int], divisible_by:int, monkey_on_true: int, monkey_on_false: int, operation: str ):
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self.items = start_items
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self.div_by = divisible_by
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self.monkey_on_true = monkey_on_true
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self.monkey_on_false = monkey_on_false
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self.operation = lambda x : x
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self.inspections = 0
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if operation.startswith('*'):
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try:
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i = int(operation[2:])
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self.operation = lambda x : x * i
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except:
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self.operation = lambda x : x * x
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else:
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try:
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i = int(operation[2:])
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self.operation = lambda x : x + i
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except:
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self.operation = lambda x : x + x
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Monkey.monkeys.append(self)
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def do_business(self):
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for _ in range(len(self.items)):
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self.items[0] = (self.operation(self.items[0]) % Monkey.common_divisor) // Monkey.worry_level_decrease
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if self.items[0] % self.div_by == 0:
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Monkey.monkeys[self.monkey_on_true].recv_item(self.items.pop(0))
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else:
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Monkey.monkeys[self.monkey_on_false].recv_item(self.items.pop(0))
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self.inspections += 1
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def recv_item(self, item: int):
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self.items.append(item)
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def get_inspections(self):
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return self.inspections
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re_monkey = r"Monkey (\d+):\n *Starting items: (.*)\n *Operation: new = old (.*)\n *Test: divisible by (\d+)\n *If true: throw to monkey (\d+)\n *If false: throw to monkey (\d+)"
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def do_monkey_business(filename):
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with open(filename, "r") as file:
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content = file.read()
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for match in finditer(re_monkey, content):
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g = match.groups()
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Monkey([int(x) for x in g[1].replace(" ", "").split(",")], int(g[3]), int(g[4]), int(g[5]), g[2])
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monkey_copy = deepcopy(Monkey.monkeys)
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for i in range(len(Monkey.monkeys)):
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Monkey.common_divisor *= Monkey.monkeys[i].div_by
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# Task 1
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Monkey.worry_level_decrease = 3
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for _ in range(20):
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for i in range(len(Monkey.monkeys)):
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Monkey.monkeys[i].do_business()
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ranking = [m.get_inspections() for m in Monkey.monkeys]
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ranking.sort()
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result = ranking[-2] * ranking[-1]
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print(f"Task 1: Monkey business level at {result}")
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# Task 2
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Monkey.monkeys = monkey_copy
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Monkey.worry_level_decrease = 1
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for _ in range(10000):
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for i in range(len(Monkey.monkeys)):
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Monkey.monkeys[i].do_business()
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ranking = [m.get_inspections() for m in Monkey.monkeys]
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ranking.sort()
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result = ranking[-2] * ranking[-1]
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# print(ranking)
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print(f"Task 2: Monkey business level at {result}")
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if __name__ == '__main__':
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if not len(argv) == 2:
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print(f"Expected exactly one argument (filename), got {len(argv)-1}")
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exit(1)
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do_monkey_business(argv[1])
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