Let Q denote a queue containing sixteen numbers and S be an empty stack. Head(Q) returns the element at the head of the queue Q without removing it from Q. Similarly Top (S) returns the element at the top of S without removing it from S. Consider the algorithm given below.
while Q is not Empty do if S is Empty OR Top(S) ≤ Head (Q) then x:= Dequeue (Q); Push (S, x); else x:= Pop(S); Enqueue (Q, x); end end
The maximum possible number of iterations of the while loop in the algorithm is _______.