#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n,x,c,low = 0,high = 0,just = 0;
    cin >> n >> x;
    for(int i = 0;i < n;i++){
        cin >> c;
        if(c == x)just++;
        else if(c < x)low++;
        else high++;
    }
    if(just > 0 || low > 0 && high >> 0)cout << "Yes" << endl;
    else cout << "No" << endl;
}