可以用map做

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

int main()
{
    map<string,pair<int,int>> m1;
    map<int,double> m2;
    int n,m;
    cin >> n >> m;
    for (int i=0;i<n;i++)
    {
        string s;
        int a,b,c;
        cin >> s >> a >> b >> c;
        m1[s]={b,c};
        m2[a]=(b+c)/2.0;
    }
    for (int i=0;i<m;i++)
    {
        string s;
        cin >> s;
        if (s=="name")
        {
            string t;
            cin >> t;
            cout << m1[t].first << ' ' << m1[t].second << endl;
        }
        else
        {
            int a;
            cin >> a;
            printf("%.2f\n",m2[a]);
        }
    }
	return 0;
}