public static void Simple_Priority_Queue()
{
var pq = new PrioritySet <string, int>();
pq.Enqueue("John", 1940);
pq.Enqueue("Paul", 1942);
pq.Enqueue("George", 1943);
pq.Enqueue("Ringo", 1941);
Assert.Equal("John", pq.Dequeue());
Assert.Equal("Ringo", pq.Dequeue());
Assert.Equal("Paul", pq.Dequeue());
Assert.Equal("George", pq.Dequeue());
}
