这是bug吗？求助

#include<cstdio>
#include<iostream>
#include<algorithm>
using namespace std;
struct student{
	string name;
	int qimo;
	int banji;
	char ganbu;
	char xibu;
	int lunwen;
	int all;
}a[10086];
int n,ans;
int cmp(student x,student y)
{
	return x.all>y.all;
}
int main()
{
	cin>>n;
	for(int i=0;i<n;++i)
	  cin>>a[i].name>>a[i].qimo>>a[i].banji>>a[i].ganbu>>a[i].xibu>>a[i].lunwen;
	for(int i=0;i<n;++i)
	{
		if(a[i].qimo>80&&a[i].lunwen>=1) a[i].all+=8000;
		if(a[i].qimo>85&&a[i].banji>80) a[i].all+=4000;
		if(a[i].qimo>90) a[i].all+=2000;
		if(a[i].qimo>85&&a[i].xibu=='Y') a[i].all+=1000;
		if(a[i].banji>80&&a[i].ganbu=='Y') a[i].all+=850;
	}
	for(int i=0;i<n;++i)
	  ans+=a[i].all;
	sort(a,a+n,cmp);
	cout<<a[0].name<<endl;
	cout<<a[0].all<<endl;
	cout<<ans<<endl;
	return 0;
}