80 lines
1.6 KiB
Plaintext
80 lines
1.6 KiB
Plaintext
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<Query Kind="Statements" />
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var guards = new List<(int id, int awake, int[] minutes)>();
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var data = File
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.ReadAllLines(Path.Combine(Path.GetDirectoryName(Util.CurrentQueryPath), @"04_input.txt"))
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.Where(p=>!string.IsNullOrWhiteSpace(p))
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.OrderBy(p=>p);
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int guard=-1;
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int wakeup=0;
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int wakesum=0;
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bool awake=true;
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int[] mins = new int[60];
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foreach (var line in data)
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{
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int m = int.Parse(line.Substring(15,2));
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if (line.Contains("Guard"))
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{
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if (awake)
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{
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wakesum += (60 - wakeup);
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for (int i = wakeup; i < 60; mins[i++] = 1) ;
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}
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if (guard>=0)guards.Add((guard, wakesum, mins));
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guard = int.Parse(line.Substring(26).Split(' ')[0]);
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awake=true;
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wakeup=0;
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wakesum=0;
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mins = new int[60];
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}
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else if (line.Contains("falls asleep"))
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{
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awake = false;
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wakesum += (m-wakeup);
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for (int i = wakeup; i < m; mins[i++]=1);
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}
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else if (line.Contains("wakes up"))
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{
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awake = true;
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wakeup=m;
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}
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else throw new Exception();
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}
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guards
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.GroupBy(g => g.id)
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.Select(p => new
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{
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id = p.Key,
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awake_total = p.Sum(q => q.awake),
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asleep_total = p.Sum(q => 60 - q.awake),
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mins = p.Select(q => q.minutes).Aggregate((a, b) => a.Zip(b, (u, v) => u + v).ToArray())
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})
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.Select(p => new
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{
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id = p.id,
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awake_total = p.awake_total,
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asleep_total = p.asleep_total,
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mins = p.mins,
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most_sleep_min = p.mins.Select((v, i) => (v, i)).OrderBy(q => q.v)
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})
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.Select(p => new
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{
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id = p.id,
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awake_total = p.awake_total,
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asleep_total = p.asleep_total,
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mins = p.mins,
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most_sleep_min = p.most_sleep_min,
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result = p.most_sleep_min.First().i * p.id
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})
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.OrderByDescending(p => p.asleep_total)
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.First()
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.result
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.Dump();
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