include <stdio.h>

int main() {

int maxn = 0, day, a, b, 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;

}