系统自带的哈希表

#include <iostream>
#include <algorithm>
#include<unordered_map>//哈希表头文件
using namespace std;
unordered_map<int,bool> hashTable;//简历一个哈希表

int main() {
    int n, m, f = 0;
    cin >> n;
    int a[100];
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
        hashTable[a[i]] = true;
    }
    cin >> m;
    for (int i = 0; i < m; ++i) {
        int target;
        cin>>target;
        if(hashTable[target]){
            std::cout<<"YES"<<std::endl;
        }else{
            std::cout<<"NO"<<std::endl;
        }
    }

}