#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 1000000001

int main(){
	
	int N,X;
	cin>>N>>X;
	
	vector<int> C(N);
	rep(i,N){
		cin>>C[i];
	}
	
	if((C[0]<X&&C.back()>X)||C[0]==X||C.back()==X){
		cout<<"Yes"<<endl;
	}
	else cout<<"No"<<endl;
	
    return 0;
}