static void Main(string[] args)
{
var firstUnique = new FirstUnique(new int[] { 2, 3, 5 });
Console.WriteLine(firstUnique.ShowFirstUnique());
firstUnique.Add(5);
Console.WriteLine(firstUnique.ShowFirstUnique());
firstUnique.Add(2);
Console.WriteLine(firstUnique.ShowFirstUnique());
firstUnique.Add(3);
Console.WriteLine(firstUnique.ShowFirstUnique());
}
static void Main(string[] args)
{
FirstUnique firstUnique = new FirstUnique(new int[] { 2, 3, 5 });
Console.WriteLine(firstUnique.ShowFirstUnique()); // return 2
firstUnique.Add(5); // the queue is now [2,3,5,5]
Console.WriteLine(firstUnique.ShowFirstUnique()); // return 2
firstUnique.Add(2); // the queue is now [2,3,5,5,2]
Console.WriteLine(firstUnique.ShowFirstUnique()); // return 3
firstUnique.Add(3); // the queue is now [2,3,5,5,2,3]
Console.WriteLine(firstUnique.ShowFirstUnique()); // return -1
Console.ReadKey();
}