#include <bits/stdc++.h>
using namespace std;
int a[7], b[7], c[7];
int main() {
	int max = -1000000000, t, sum = 0;
	for(int i = 0; i < 7; i++) {
		cin >> a[i] >> b[i];
		c[i] = a[i] + b[i];
	}
	for(int i = 0; i < 7; i++) {
		if(c[i] > max) {
			max = c[i];
			t = i;
			sum++;
		}
	}
	if(sum == 0)
		printf("0");
	else
		printf("%d", t);
	return 0;
}