C

#define _CRT_SECURE_NO_DEPRECATE

#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <stack>
#include <algorithm>

using namespace std;

int a[5001];

int main() {
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);

	int n, k;
	cin >> n >> k;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < k; i++) {
		int c;
		cin >> c;
		int l = 0;
		int r = n - 1;
		while (l + 1 < r) {
			int m = (l + (r - l) / 2);
			if (a[m] > c) {
				r = m;
			}
			else {
				l = m;
			}
		}
		if (a[r] == c || a[l] == c) {
			cout << "YES" << endl;
		}
		else {
			cout << "NO" << endl;
		}
	}

}