#include <iostream>
#include <vector>

using namespace std;

int main(){
    int n,x;
    cin>>n>>x;
    bool low=false,high=false;
    for(int i=0;i<n;i++){
        int ci;
        cin>>ci;
        if(ci==x){
            cout<<"Yes"<<endl;
            return 0;
        }else if(ci<x){
            low=true;
        }else{
            high=true;
        }
    }
    if(low && high){
        cout<<"Yes"<<endl;
    }else{
        cout<<"No"<<endl;
    }

    return 0;
}