public int TotalWayTime()
{
int totalTime = NonEmptyRoutes.Select(r => r.Waypoints.Last().StartTime - r.Waypoints[0].StartTime).Sum();
return(totalTime - TotalVisitTime());
}
public int LongestDay()
{
return(NonEmptyRoutes.Select(r => r.Waypoints.Max(wp => wp.StartTime) - r.Waypoints.Min(wp => wp.StartTime)).Append(0).Max());
}
public int NumberOfNeededSantas()
{
return(NonEmptyRoutes.Select(FindDay).GroupBy(d => d).Select(g => g.Count()).Append(0).Max());
}
public int SantaWorkTime()
{
return(NonEmptyRoutes.Select(r => r.Waypoints.Max(wp => wp.StartTime) - r.Waypoints.Min(wp => wp.StartTime)).Sum());
}