public void AddHistogram(GuardSleepHistogram histogram)
{
for (int i = 0; i < MinutesOnHour; i++)
{
SleepOnMunute[i] += histogram.SleepOnMunute[i];
}
}
private static Dictionary <int, GuardSleepHistogram> BuildFullHistorgram(List <GuardEvent> guardEvents)
{
Dictionary <int, GuardSleepHistogram> dictFullHistogram = new Dictionary <int, GuardSleepHistogram>();
foreach (IGrouping <int, GuardEvent> group in guardEvents.GroupBy(guardEvent => guardEvent.Date.DayOfYear))
{
Dictionary <int, GuardSleepHistogram> dictDayHistogram = new Dictionary <int, GuardSleepHistogram>();
foreach (GuardEvent guardEvent in group)
{
if (guardEvent.ID == null)
{
continue;
}
GuardSleepHistogram dayGuardHistogram = null;
if (dictDayHistogram.ContainsKey((int)guardEvent.ID))
{
dayGuardHistogram = dictDayHistogram[(int)guardEvent.ID];
}
else
{
dayGuardHistogram = new GuardSleepHistogram {
ID = (int)guardEvent.ID
};
dictDayHistogram.Add(dayGuardHistogram.ID, dayGuardHistogram);
}
if (guardEvent.Type == GuardEventType.FallSleep)
{
dayGuardHistogram.FallSleep(guardEvent.Date.Minute);
}
if (guardEvent.Type == GuardEventType.WakeUp)
{
dayGuardHistogram.WakeUp(guardEvent.Date.Minute);
}
}
foreach (GuardSleepHistogram dayGuardHistogram in dictDayHistogram.Values)
{
GuardSleepHistogram guardHistogram = null;
if (dictFullHistogram.ContainsKey(dayGuardHistogram.ID))
{
guardHistogram = dictFullHistogram[dayGuardHistogram.ID];
guardHistogram.AddHistogram(dayGuardHistogram);
}
else
{
dictFullHistogram.Add(dayGuardHistogram.ID, dayGuardHistogram);
}
}
}
return(dictFullHistogram);
}
public string ResolvePart1(string[] inputs)
{
List <GuardEvent> guardEvents = GuardEvent.FromStringArray(inputs);
Dictionary <int, GuardSleepHistogram> dictFullHistogram = BuildFullHistorgram(guardEvents);
// Find sleepier guard
GuardSleepHistogram highestSleeperHistogram = null;
long highestTotalSleep = long.MinValue;
foreach (GuardSleepHistogram guardHistogram in dictFullHistogram.Values)
{
int totalSleep = guardHistogram.SleepOnMunute.Sum();
if (totalSleep > highestTotalSleep)
{
highestSleeperHistogram = guardHistogram;
highestTotalSleep = totalSleep;
}
}
// Find sleepier minute
int maxSleepMinute = int.MinValue;
int maxSleepMinuteValue = int.MinValue;
for (int i = 0; i < GuardSleepHistogram.MinutesOnHour; i++)
{
if (highestSleeperHistogram.SleepOnMunute[i] > maxSleepMinuteValue)
{
maxSleepMinute = i;
maxSleepMinuteValue = highestSleeperHistogram.SleepOnMunute[i];
}
}
int result = highestSleeperHistogram.ID * maxSleepMinute;
return(result.ToString());
}