#include using namespace std; #define REP(i,a,n) for(int i=(a); i<(int)(n); i++) #define rep(i,n) REP(i,0,n) #define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it) #define ALLOF(c) (c).begin(), (c).end() typedef long long ll; typedef unsigned long long ull; int main(){ int N, X; cin >> N >> X; vector v(N); rep(i,N) cin >> v[i]; int mn = v[0], mx = v[0]; rep(i,N){ mn = min(mn, v[i]); mx = max(mx, v[i]); } if(X < mn || mx > X){ cout << "No" << endl; }else{ cout << "Yes" << endl; } return 0; }