#include <iostream>
#include <vector>
#include <string>

using namespace std;

string binary(int start, int end, vector<int> a, int search) {

    if ((start == end && a[start] != search) || start > end) {
        return "NO";
    } else {
        int ser = (start + end) / 2;
        if (a[ser] > search) {
            return binary(start, ser - 1, a, search);
        } else if (a[ser] < search) {
            return binary(ser + 1, end, a, search);
        } else {
            return "YES";
        }
    }
}

int main() {
    int n, k, t;
    cin >> n;
    cin >> k;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 0; i < k; i++) {
        cin >> t;
        cout << binary(0, n - 1, a, t) << endl;
    }
    return 0;
}