#include <bits/stdc++.h>
using namespace std;
using ll = long long;

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