#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n, x;
  cin >> n >> x;
  vector<int> c(n);
  rep(i, n) cin >> c[i];
  cout << (c.front() <= x && x <= c.back() ? "Yes" : "No") << endl;
  return 0;
}