include <bits/stdc++.h>

using namespace std;

int main () {

int a = 0, b = 0, c, d, e = 0;
for (int i = 1; i <= 7; i++) {

	cin >> c >> d;
	e = c + d;
	if (a < e && e > 8) {
		a = e;
		b = i;
	}
}
cout << b;
return 0;

}