#include <iostream>
using namespace std;
	int bin_s(int a[],int x, int n){
		int l=0,r=n-1, m;
		while(l<r){
			m=(l+r)/2;
			if(x>a[m])
			l=m+1;
		else r=m;
		}
		return 1;
	}
int main(){
	int n, k;
	cin>>n>>k;
	int a[n];
	for (int i=0; i<n; i++)
		cin>>a[i];
	for (int i=0; i<k; i++){
		int x;
		cin>>x;
		int l=0, r=n-1;
		while(l<r){
			int m=(l+r)/2;
			if(a[m]<x)
			l=m+1;
		else r=m;
		}
		if(x==a[l])cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	}
	return 0;
}

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MTAgNQoxIDIgMyA0IDUgNiA3IDggOSAxMCAKLTIgMCA0IDkgMTIg

10 5
1 2 3 4 5 6 7 8 9 10 
-2 0 4 9 12