TJ

3、2、1上代码

#include<bits/stdc++.h>
#define int long long
using namespace std;
int n, m, a[2000010], x;
signed main() {
    cin >> n >> m;
    for(int i = 1;i <= n;i++) cin >> a[i];
    while(m--) {
        cin >> x;
        cout << a[x] << endl;
    }
    return 0;
}