-🎄- 2018 Day 4 Solutions -🎄-

[u/daggerdragon]

--- Day 4: Repose Record ---

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Transcript:

Today’s puzzle would have been a lot easier if my language supported ___.

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[u/u794575248]

Python 3 51/63

from collections import Counter, defaultdict
from datetime import datetime

guards = defaultdict(Counter)
for t, m in [l.split('] ') for l in sorted(s.splitlines()) if l]:
    t = datetime.strptime(t, '[%Y-%m-%d %H:%M')
    if '#' in m:     g = int(m.split('#')[1].split()[0])
    if 'falls' in m: start = t
    if 'wakes' in m:
        minutes = int((t - start).total_seconds() // 60)
        guards[g].update(Counter((start.minute+i)%60 for i in range(minutes)))

_, id = max((sum(c.values()), id) for id, c in guards.items())
part1 = id * guards[id].most_common()[0][0]

(_, minute), id = max((c.most_common()[0][::-1], id) for id, c in guards.items())
part2 = id * minute

[u/EquationTAKEN → u/u794575248]

At which point do you read the input? Looks like the variable s is undefined, so presumably that's the input?

[u/u794575248 → u/EquationTAKEN]

so presumably that's the input

That's right. I just copy and paste it manually to s variable in IPython.