哈希表法

#include <iostream>
using namespace std;
bool hashTable[100000000];//哈希表，下标等于查找的值，有为true 没有为false
int main() {
    int n, m;
    cin >> n;
    int a[100];
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
        hashTable[a[i]] = true;//有把，对应元素下标值设为true
    }
    cin >> m;
    for (int i = 0; i < m; ++i) {
        int target;
        cin>>target;
        if(hashTable[target]){//判断是否有
            std::cout<<"YES"<<std::endl;
        }else{
            std::cout<<"NO"<<std::endl;
        }
    }

}