using System;
using System.Collections;
class Program
{
public static Queue queue;
static void Main() {
queue = new Queue();
queue.Enqueue(5);
queue.Enqueue(2);
queue.Enqueue(7);
queue.Enqueue(3);
queue.Enqueue(6);
queue.Enqueue(1);
queue.Enqueue(9);
Console.WriteLine(queue.Contains(2));
Console.WriteLine(queue.Contains(4));
}
}
/*
run:
True
False
*/