import java.util.Scanner;

public class HelloWorld {

	    public static void main(String[] args) throws Exception {

	    	Scanner sc = new Scanner(System.in);
	    	int n = sc.nextInt();
	    	int x = sc.nextInt();
	    	int[] ci = new int[n];

	    	boolean flag_equal = false;
	    	boolean flag_smaller = false;
	    	boolean flag_bigger = false;
	    	for (int i=0; i < n; i ++) {
	    		ci[i] = sc.nextInt();
	    		if (ci[i] == x) {flag_equal = true;}
	    		if (ci[i] > x) {flag_bigger = true;}
	    		if (ci[i] < x) {flag_smaller = true;}
	    	}
	    	sc.close();

	    	if (flag_equal == true) {
	    		System.out.println("Yes");
	    	}else if (flag_bigger ==true && flag_smaller == true) {
	    		System.out.println("Yes");
	    	}else {
	    		System.out.println("No");
	    	}

	    }
}