题解

#include <bits/stdc++.h>
using namespace std;

const int N = 100 + 10;

struct Student{
    string name;
    int id;
    int ch;
    int ma;
};

int main(){
    int n, m;
    Student a[N];
    cin >> n >> m;
    for(int i = 0;i < n;i++){
        cin >> a[i].name >> a[i].id >> a[i].ch
            >> a[i].ma;
    }
    for(int i = 0;i < m;i++){
        string user;
        cin >> user;
        if(user == "name"){
            string user_name;
            cin >> user_name;
            for(int i = 0;i < n;i++){
                if(a[i].name == user_name){
                    printf("%d %d\n", a[i].ch, a[i].ma);
                    break;
                }
            }
        }
        else{
            int user_id;
            cin >> user_id;
            for(int i = 0;i < n;i++){
                if(a[i].id == user_id){
                    printf("%.2lf\n", (a[i].ch + a[i].ma) / 2.0);
                    break;
                }
            }
        }
    }
    return 0;
}