#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MOD 1000000007
#define INF 1000000000
#define MAX 500000


int main(){
  int N,X;
  cin>>N>>X;
  vector<int> C(N);
  bool flag=false;
  for(int i=0;i<N;i++){
    cin>>C[i];
    if(C[i]==X){
      flag=true;
    }
  }
  sort(C.begin(),C.end());
  if(flag==true){
    cout<<"Yes"<<endl;
  }else{
    if(C[0]<X&&X<C[N-1]){
      cout<<"Yes"<<endl;
    }else{
      cout<<"No"<<endl;
    }
  }

}