public Day4day(DateTime timestamp, ref Day4Guard guard)
{
this.timestamp = timestamp;
this.guard = guard;
for (int i = 0; i < 60; i++)
{
minutesAwake[i] = true;
}
}
public static string solvePart1()
{
Day4Guard maxGuard = new Day4Guard(-1);
foreach (Day4Guard guard in guards.Values)
{
if (guard.totalTimeAsleep > maxGuard.totalTimeAsleep)
{
maxGuard = guard;
}
}
var minutes = new int[60];
for (int i = 0; i < 60; i++)
{
minutes[i] = 0;
}
foreach (Day4day day in days)
{
if (day.guard.ID == maxGuard.ID) //filter only on the correct guards
{
string dbgout = "[";
for (int i = 0; i < 60; i++)
{
if (day.minutesAwake[i] == false)
{
minutes[i] += 1;
}
dbgout += minutes[i] + ",";
}
dbgout += "]";
}
}
var maxminute = 0;
var maxID = 0;
for (int i = 0; i < 60; i++)
{
if (minutes[i] > maxminute)
{
maxminute = minutes[i];
maxID = i;
}
}
var outstring = "Guard ID[" + maxGuard.ID + "] was asleep.";
outstring += "]<br/> optimal minute = [" + maxID + ", " + maxminute + " times]<br/>";
outstring += "Checksum = <b>[" + (maxID * maxGuard.ID) + "]</b>";
return(outstring);
}
public static string parse(string problem)
{
/* //
* [1518-11-01 00:00] Guard #10 begins shift
* [1518-11-01 00:05] falls asleep
* [1518-11-01 00:25] wakes up
* [1518-11-01 00:30] falls asleep
* [1518-11-01 00:55] wakes up
* [1518-11-01 23:58] Guard #99 begins shift
* [1518-11-02 00:40] falls asleep
* [1518-11-02 00:50] wakes up
* [1518-11-03 00:05] Guard #10 begins shift
* [1518-11-03 00:24] falls asleep
* [1518-11-03 00:29] wakes up
* [1518-11-04 00:02] Guard #99 begins shift
* [1518-11-04 00:36] falls asleep
* [1518-11-04 00:46] wakes up
* [1518-11-05 00:03] Guard #99 begins shift
* [1518-11-05 00:45] falls asleep
* [1518-11-05 00:55] wakes up
*/
entries = new List <Day4Entry>();
var problems = problem.Split("\r\n");
foreach (string unparsedEntry in problems)
{
Day4Entry entry = new Day4Entry(unparsedEntry);
entries.Add(entry);
}
entries.Sort();
string returnvalue = "";
foreach (var entry in entries)
{
returnvalue += entry.ToString() + "<br/>";
}
//now that we're sorted, we can do several things
//loop through the entries and get days
//simultaneously get a list of guards
guards = new Dictionary <int, Day4Guard>();
days = new List <Day4day>();
int guardID;
var currentGuard = new Day4Guard(-1);
Day4day currentDay = new Day4day(new DateTime(1900, 1, 1), ref currentGuard);
//iterate through all sorted entries, creating guards as necessary, adding minutes as necessary.
foreach (var entry in entries)
{
//[1518-11-01 23:58] Guard #99 begins shift
//[1518 - 11 - 02 00:40] falls asleep
//[1518 - 11 - 02 00:50] wakes up
if (entry.action.Substring(0, 5) == "Guard")
{
//new shift, create day, create guard.
//assign guard to day
var IDPieces = entry.action.Split(" ");
guardID = int.Parse(IDPieces[1].Substring(1));
guards.TryGetValue(guardID, out currentGuard);
if (currentGuard == null)
{
currentGuard = new Day4Guard(guardID);
guards.TryAdd(currentGuard.ID, currentGuard);
}
currentDay = new Day4day(entry.timestamp, ref currentGuard);
days.Add(currentDay);
}
else if (entry.action.Substring(0, 5) == "falls")
{
//First the guard is set to being asleep
//second the timestamp is set
currentDay.guard.fallAsleep(entry.timestamp);
}
else if (entry.action.Substring(0, 5) == "wakes")
{
//find out the time they fell asleep
//find out the time they woke up
//add time asleep to day.
currentGuard.awaken(entry.timestamp);
var startsleep = currentGuard.timeFellAsleep;
currentGuard.totalTimeAsleep += Convert.ToInt32((entry.timestamp - startsleep).TotalMinutes);
for (int i = startsleep.Minute; i < entry.timestamp.Minute; i++)
{
currentDay.minutesAwake[i] = false;
currentGuard.timeasleepperminute[i]++;
}
}
}
return(returnvalue);
}
