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

int main()
{
	int a, b, max = 0, p = 0;

	for (int i = 1; i <= 7; i++)
	{
		cin >> a >> b;
		if (a + b > max)
		{
			max = a + b;
			p = i;
		}
	}

	if (max <= 8)
		cout << 0 << endl;
	else
		cout << p << endl;
	return 0;
}