Q02

Queue is:
	Stack s1
	Stack s2


(1) Init (Queue q)

	Init (q.s1)
	Init (q.s2)


(2) Bool IsEmpty (Queue q)

	if (IsEmpty (q.s1) && IsEmpty (q.s2))
		return true
	else
		return false


(3) Enqueue (Queue q, T item)

	while (!IsEmpty (q.s1))
		Push (q.s2, Top (q.s1))
		Pop (q.s1)
	push (q.s2, item)
	while (!IsEmpty (q.s2))
		Push (q.s1, Top (q.s2))
		Pop (q.s2)


(4) Dequeue (Queue q)

	Pop (s.q1)


(5) T Front (Queue q)

	Top (s.q1)