题解

#include<bits/stdc++.h>
using namespace std;
struct stu{
	string name;
	int stu_number;
	int stu_Chinese;
	int stu_Maths; 
}a[100001]; 
int main()
{
	int n,m;
	cin>>n>>m;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i].name>>a[i].stu_number>>a[i].stu_Chinese>>a[i].stu_Maths;
	}
	for(int i=1;i<=m;i++)
	{
		string pd_name;
		cin>>pd_name;
		if(pd_name=="name")
		{
			string pd_mz;
			cin>>pd_mz;
			for(int i=1;i<=n;i++)
			{
				if(pd_mz==a[i].name)
				{
					cout<<a[i].stu_Chinese<<" "<<a[i].stu_Maths<<endl;
					break;
				}
			}
		}
					else{
					int x;
					cin>>x;
					for(int i=1;i<=n;++i)
					{
						if(x==a[i].stu_number)
						{
							cout<<fixed<<setprecision(2)<<(a[i].stu_Chinese+a[i].stu_Maths)/2.0<<endl;
							break;
						}
					}
		}
	}
	}