题解 | #判断元素是否出现#

#include<bits/stdc++.h>
#include <map>

using namespace std;
int main(){
	//write your code here......
	int n, m;
    cin >> n >> m;
    map<int, int> map;
    while(n--) {
        int tmp;
        cin >> tmp;
        map[tmp] = 1;
    }
    while(m--) {
        int tmp;
        cin >> tmp;
        if(map.find(tmp) != map.end()){
            cout << "yes" << endl;
        }else {
            cout << "no" << endl;
        }
    }
	return 0;
}