#include<bits/stdc++.h>
using namespace std;
int main()
{
	//freopen(".in", "r", stdin);
	//freopen(".out", "w", stdout);
	long long a, b, sum = 0, ans;
	bool f = 0;
	for(int i = 1; i <= 7; i ++)
	{
		cin >> a >> b;
		if(a + b > sum)
			sum = a + b, ans = i, f = 1;
	}
	if(!f)
		cout << 0;
	else
		cout << ans;
	return 0;
}