#include #define rep(i,N) for(int i=0;i<(N);i++) #define rrep(i, n) for (int i = (int)n-1; i >= 0; --i) #define FOR(i,a,b) for(int i=(a);i<(b);i++) using namespace std; const long long MOD = 1e9 + 7; const long long INF = 1e12; const int inf = 1e9; const int mod = 1e9+7; typedef long long ll; typedef pair P; typedef set S; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } __attribute__ ((constructor)) void fastio() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(10); } int main(){ int n, x; cin >> n >> x; vector a(n); rep(i, n) cin >> a[i]; sort(a.begin(), a.end()); int min_ = a[0]; int max_ = a.back(); if(min_ <= x && x <= max_){ cout << "Yes" << endl; }else{ cout << "No" << endl; } return 0; }