public class Customer {
	private final int id;
	private final double arrival;

	Customer(int idtag, double arrivaltime){
		this.id = idtag;
		this.arrival = arrivaltime;
	}

	int giveID(){
		return this.id;
	}

	double giveArrival() {
		return this.arrival;
	}

	@Override
	public String toString() {
		return String.format("%d arrives at %.1f", id, arrival);
	}
}