题解 | #判断元素是否出现#

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

	cin >> n >> m;
	map<int,string> ma;
	for(int i=0; i<n; i++){
		cin >>k;
		ma.insert(pair<int,string>(k,"yes"));
	}

	for(int i=0; i<m; i++){
		cin >>x;
		if(ma.find(x) == ma.end()){
			cout << "no"<< endl;
		}
		else
		{
			cout << "yes" << endl;
		}
	}

	return 0;
}