52 lines
1.3 KiB
Python
52 lines
1.3 KiB
Python
from pprint import pprint
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from datetime import timedelta
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import numpy
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import dateutil.parser
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import re
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from collections import defaultdict
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guards_asleep = set()
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guard_sleep_duration = defaultdict(int)
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guard_sleep_times = defaultdict(lambda: numpy.zeros(24 * 60, dtype=numpy.int))
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with open("Day4.in", "r") as f:
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lines = sorted(f.readlines())
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RE_TIME = re.compile(r"\[(.*)\]")
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RE_SHIFT = re.compile(r".*#(\d+).*")
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current_guard = None
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last_minute = None
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for line in lines:
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time_match = RE_TIME.match(line)
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time = dateutil.parser.parse(time_match.group(1))
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minute = time.time().minute
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if last_minute is None:
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last_minute = minute
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delta = minute - last_minute
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if current_guard in guards_asleep:
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guard_sleep_duration[current_guard] += delta
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for i in range(last_minute, minute):
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guard_sleep_times[current_guard][i] += 1
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last_minute = minute
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match = RE_SHIFT.match(line)
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if match:
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current_guard = int(match.group(1))
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if "wakes up" in line:
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guards_asleep.discard(current_guard)
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if "falls asleep" in line:
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guards_asleep.add(current_guard)
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a = numpy.array([numpy.insert(value, 0, key) for (key, value) in guard_sleep_times.items()])
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x, y = numpy.unravel_index(a[:, 1:].argmax(), a[:, 1:].shape)
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guard = a[x, 0]
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print(guard, y, guard * y)
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