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

template <class A, class B> bool cmin(A& a, B b) { return a > b && (a = b, true); }
template <class A, class B> bool cmax(A& a, B b) { return a < b && (a = b, true); }

signed main() {
  cin.tie(nullptr)->sync_with_stdio(false);

  int N, X;
  cin >> N >> X;
  vector<int> C(N);
  for (int i = 0; i < N; i++) cin >> C.at(i);

  for (const auto& a : C) if (a == X) return cout << "Yes" << '\n', 0;

  int mx = *max_element(C.begin(), C.end());
  int mi = *min_element(C.begin(), C.end());

  if (mx > X && mi < X) return cout << "Yes" << '\n', 0;
  cout << "No" << '\n';
}