public static void Main()
{
PriorityQueue <int> pq = new PriorityQueue <int>();
pq.Enque(2);
pq.Enque(3);
pq.Enque(4);
pq.Enque(1);
Console.WriteLine(pq.Peek());
Console.WriteLine(pq.Deque());
Console.WriteLine(pq.Peek());
Console.WriteLine(pq.Count);
}
