#include "bits/stdc++.h"
using namespace std;

using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = (ll)1e9 + 7;

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	ll N, X; cin >> N >> X;
	vector<ll>C(N); for (int i = 0; i < N; i++)cin >> C[i];
	
	bool ok = false, ok2 = false;
	for (int i = 0; i < N; i++) {
		if (C[i] >= X) {
			ok = true;
		}
		if (C[i] <= X)ok2 = true;
	}
	if (ok&&ok2)cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}