#include<iostream>
using namespace std;

int main(){
	int max=0,day=0;
	for (int i=1,x,y; i<=7; i++){
		cin>>x>>y;
		if (x+y>max) max=x+y,day=i;
	}
	if (max<=8) day=0;
	cout<<day<<endl;
	return 0;
}