#include<iostream>
using namespace std;
int tot[100];
struct study_time
{
	int school;
	int extra;
}a[100];
int main()
{
	int maxn = 0, ans;
	for (int i = 1; i <= 7; i++)
	{
		cin >> a[i].school >> a[i].extra;
		tot[i] = a[i].school + a[i].extra;
		if (tot[i] > maxn&&tot[i]>8)
		{
			maxn = tot[i];
			ans = i;
		}		
	}
	cout << ans;
}