#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;

#define MOD 1000000007
#define MOD99 998244353

int main()
{
    int n,x,c,high = 0,low = 0;
    cin >> n >> x;
    for(int i = 0;i < n;i++){
        cin >> c;
        if(i == 0)low = c;
        if(i == n - 1)high = c;
    }
    if(low <= x && x <= high)cout << "Yes" << endl;
    else cout << "No" << endl;
}