import java.io.*;
import java.util.Scanner;
public class FreeShirts
{
	public static void main(String[] args) throws IOException //throw-n provides exception if file not found
		{
		int wash = 0;
			//open file for reading, must create file object first
			File file = new File("C:\\Users\\mitcpale842\\Desktop\\ECOO_fileReading\\DATA11.txt");
			// on windows must use two backslashes

			Scanner inputFile = new Scanner(file);
			int b=0,a=0,v=0;
			while (inputFile.hasNext())
			{

				int n = inputFile.nextInt();
				int m = inputFile.nextInt();
				 int d = inputFile.nextInt();

						inputFile.nextLine();
				String sentence = inputFile.nextLine();
				String[] a1 = sentence.split(" ");

				int D = 0;
				int N =0;
			//	int wash = 0;
				 for(int i = 1; i <= D; i++)
			        {
			            N--;
			            for(int x = 0; x < a1.length; x++)
			            { if(i== Integer.parseInt(a1[x]))
			            	{ N++;
			            	}
			            	}
			            }
			            if(N == 0)
			            {
			                wash++;
			                 N = n;
			            }
			}

			System.out.println(wash);

			inputFile.close();

		}



}