#include <bits/stdc++.h>
using namespace std;
int n[1001], y[1001], m , c;
int main() {
	
	for (int i = 1; i <= 7; i++) {
		cin >> n[i] >> y[i];
		if (n[i] + y[i] > m) {
			m = n[i] + y[i];
			c = i;

		}
	}
	cout << c;
	return 0;
}