#include <iostream>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <numeric>
#include <bitset>
#include <cmath>

static const int MOD = 1000000007;
using ll = long long;
using u32 = unsigned;
using u64 = unsigned long long;
using namespace std;

template<class T> constexpr T INF = ::numeric_limits<T>::max() / 32 * 15 + 208;

int main() {
    int n, x;
    cin >> n >> x;
    vector<int> v(n);
    for (auto &&i : v) scanf("%d", &i);
    if(v.front() <= x && x <= v.back()) puts("Yes");
    else puts("No");
    return 0;
}