#include <iostream>
using namespace std;

int main()
{
	int maxn = -1e9;
	int m = 0,x = 0;
	for (int i = 1; i <= 7; i++)
	{
		int a,b;
		cin >> a >> b;
		if ((a + b) > maxn)
		{
			x += 1;
			m = x;
		}
		else
		{
			x += 1;
		}
		maxn = max(maxn,(a + b));
	}
	cout << m;
    return 0;
}