#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() { 
  ios::sync_with_stdio(false); cin.tie(0);
  int n, x;
  cin >> n >> x;
  bool hi = false, lo = false;
  for (int i = 0; i < n; i++) {
    int a;
    cin >> a;
    if (a >= x) {
      hi = true;
    }
    if (a <= x) {
      lo = true;
    }
  }
  cout << (hi && lo ? "Yes" : "No") << endl;
  return 0;
}