#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    int n, x;
    cin >> n >> x;

    int b[2] = {};
    for (int i = 0; i < n; i++) {
        int c;
        cin >> c;

        if (c <= x) b[0] = 1;
        if (c >= x) b[1] = 1;
    }

    cout << ((b[0] && b[1]) ? "Yes" : "No") << endl;

    return 0;
}