少说废话，直接上代码

#include<bits/stdc++.h>
using namespace std;
int a[10],ans,h;
int main(){
	for(int i=1;i<=7;i++){
		int x,y;
		cin>>x>>y;
		a[i]=x+y;
		if(a[i]>ans){
			ans=a[i];
			h=i;
		}
	}
	if(ans<8){
		cout<<0;
	}else 
		cout<<h;
	return 0;
}