题解 | #判断元素是否出现#

#include<iostream>
#include<map>
using namespace std;
#include<set>

int main() {
	//write your code here......
	int n, m;
	cin >> n >> m;
	//int * a = new int[n];
	set<int> s;
	int num = 0;
	for (int i = 0; i < n; i++)
	{
		cin >> num;
		s.insert(num);
	}

	while (m--)
	{
		cin >> num;
		if (s.count(num))
		{
			cout << "yes" << endl;
		}
		else
		{
			cout << "no" << endl;
		}
	}

	return 0;
}