static void Main(String[] args)
{
string[] tokens = Console.ReadLine().Split();
int N = int.Parse(tokens[0]);
int S = int.Parse(tokens[1]);
int pfCount = 0; // page fault count
LRU lruObj = new LRU();
for (int T = N; T > 0;)
{
tokens = Console.ReadLine().Split();
T -= tokens.Length;
for (int i = 0; i < tokens.Length; i++)
{
int item = int.Parse(tokens[i]);
ListNode pos = lruObj.find(item);
if (pos == null)
{
if (lruObj.Count == S)
{
lruObj.Dequeue();
}
lruObj.Enqueue(item);
pfCount++;
}
else
{
lruObj.UpdateAsMRU(pos);
}
}
}
Console.WriteLine(pfCount);
Console.WriteLine(lruObj.GetAllItems());
}