就第一个点WA，没找出问题，哪位大佬来给看看，谢谢

#include<bits/stdc++.h>
using namespace std;
struct student
{
    string name;
    int chi;
    int mat;
    int eng;
    int all;
};
int main()
{
    int n;
    cin>>n;
    student a[n],max;
    for(int i=0;i<n;i++)
    {
        cin>>a[i].name>>a[i].chi>>a[i].mat>>a[i].eng;
        a[i].all=a[i].chi+a[i].mat+a[i].eng;
        if(a[i].all>max.all) max=a[i];
    }
    cout<<max.name<<" "<<max.chi<<" "<<max.mat<<" "<<max.eng;
    return 0;
}