include

using namespace std;

int main() {

int maxn = 0, a, b, i, day, c;
for (int i = 1; i <= 7; i++ ) {
	scanf("%d%d", &a, &b);
	c = a + b;
	if (c > 8 && c > maxn) {

		maxn = c;
		day = i;
	}

}
printf("%d", day);
return 0;

}