#include<iostream>
using namespace std;
int max(int sum[])
{
	int res = sum[0];
	for (int i = 0; i < 7; i++)
	{
		if (sum[i] >= res)
			res = sum[i];
	}
	return res;
}
int main()
{
	int school[7], extra[7],sum[7],n=0;
	for (int i = 0; i < 7; i++)
	{
		cin >> school[i] >> extra[i];
		sum[i] = school[i] + extra[i]-8;
		if (sum[i] <= 0)
		{
			n++;
		}
	}
	if (n == 7)
		cout << 0;
	int m = max(sum);
	int p;
	for (int i = 6; i >= 0; i--)
	{
		if (sum[i] == m)
			p = i + 1;
	}
	cout << p;
	return 0;
}