public static void TicketSale(Screening s, int num)
{
if(s.CheckCapacity(num))
{
s.Occupency += num;
}
}
public static void AddScreening(Screening s)
{
if(Screenings.ContainsKey(s.Showing))
{
Screenings[s.Showing].Add(s);
return;
}
Screenings.Add(s.Showing, new List<Screening>() { s } );
}