#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
bool a = false, b = false, c = false;
int main() {
	int n, x;
	cin >> n >> x;
	for (int i = 0; i < n; i++) {
		int d;
		cin >> d;
		if (x == d) {
			b = true;
		}
		else if (x > d) {
			a = true;
		}
		else {
			c = true;
		}
	}
	if (b || (a & c)) {
		cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
}