#include<bits/stdc++.h>
using namespace std;
struct node{
	int a;
	int b;
	int tot;
}a[10001];
int main(){
	int ans1;
	int ans2=-1;
	for(int i=1;i<=7;i++){
		cin>>a[i].a>>a[i].b;
		a[i].tot=a[i].a+a[i].b;
		if(a[i].tot>ans2){
			ans2=a[i].tot;
			ans1=i;
		}
	}
	cout<<ans1;
	return 0;
}