using System;
using System.Collections;
class MainClass {
public static void Main() {
Queue q = new Queue();
q.Enqueue(1);
q.Enqueue(2);
q.Enqueue(3);
q.Enqueue(4);
Console.Write("queue: ");
foreach(int i in q)
Console.Write(i + " ");
Console.WriteLine();
Console.Write("Dequeue -> ");
int a = (int) q.Dequeue();
Console.WriteLine(a);
Console.Write("queue: ");
foreach(int i in q)
Console.Write(i + " ");
Console.WriteLine();
}
}
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