import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int k = sc.nextInt();
		int[] c = new int[n + 1];
		for (int i = 0; i < n; i++) {
			c[sc.nextInt()]++;
		}
		sc.close();

		for (int i = 1; i <= n; i++) {
			if (c[i] + c[0] >= k) {
				System.out.println("Yes");
				return;
			}
		}
		System.out.println("No");
	}
}