P3156 【深基15.例1】询问学号

题目传送门

#include 

using namespace std;
int n, m, tmp;
vector stu;

int main() {
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        cin >> tmp;
        stu.push_back(tmp);
    }
    for (int i = 1; i <= m; i++) {
        cin >> tmp;
        cout << stu[tmp - 1] << endl;
    }
    return 0;
}