题解 | #判断元素是否出现#

#include<bits/stdc++.h>
using namespace std;
int main(){
	//write your code here......
	int n, m;
	cin >> n >> m;

	map<int, int> maps;

	int num;
	for (int i{0}; i < n; i++) {
		cin >> num;
		maps[num]++;
	}

	vector<int> v;
	for (int i{0}; i < m; i++) {
		cin >> num;
		v.push_back(num);
	}

	for (auto& item: v) {
		if (maps[item] > 0) {
			cout << "yes" << endl;
		} else {
			cout << "no" << endl;
		}
	}

	return 0;
}