#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
	int n,q;
	cin>>n>>q;
	int tab[n];
	for (int i = 0; i < n; i++) cin>>tab[i];
	for (int i = 0; i < q; i++){
		int x;
		cin>>x;
		int p = 0;
		int k = n;
		bool czyznalazl = false;
		int indeks = 0;
		while (p < k){
			int s = (p+k)/2;
			if (tab[s] == x){
				indeks = s;
				czyznalazl = true;
				break;
			}
			if (tab[s] < x){
				p = s+1;
			}else{
				k = s;
			}
		}
		if (czyznalazl == true) cout<<"YES\n";
		else cout<<"NO\n";
	}
    return 0;
}