include

using namespace std;

int main() {

int unhappy=8,unhappyday;

for (int day=1;day<=7;day++){ int n1,n2; cin >> n1>>n2;

int sum=n1+n2;
if(sum>unhappy){
	unhappy=sum;
	unhappyday=day;
}

}

cout <<unhappyday; return 0; }