写了这个代码，最后一个0分点没过！

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

struct node
{
	int id;
	int school;
	int hackhome;
	int MaxSum;
};
node a[10];

bool cmp(node a,node b)
{
	return a.MaxSum>b.MaxSum;
}

int main(){
	for(int i=1;i<=7;i++)
	{
		cin>>a[i].school>>a[i].hackhome;
		a[i].id=i,a[i].MaxSum=a[i].school+a[i].hackhome;
	}
	sort(a+1,a+8,cmp);
	cout<<a[1].id;
	return 0;
}