#include <bits/stdc++.h>
using namespace std;
int main(){
  int N, X;
  cin >> N >> X;
  vector<int> C(N);
  for (int i = 0; i < N; i++){
    cin >> C[i];
  }
  if (C[0] <= X && X <= C[N - 1]){
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}