#include<map>
#include<iostream>
using namespace std;
int s[100001];
map<int,bool>g;
int main()
{
    int n,m,ss;
    cin>>n>>m;
    for(int i=1;i<=n;++i)
    {
    cin>>s[i];
    g[s[i]]=1;
    }
    for(int i=1;i<=m;++i)
    {
        cin>>ss;
        if(g[ss]==1)
        cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
    }
    return 0;
}