#include <iostream>
#include <cstdio>
#include <algorithm>
#include <math.h>
#define sc scanf
#define pr printf
using namespace std;

int n,m;
int sum;
int maxx,day;

int main()
{
	for (int i=1; i<8; i++) //如果上课时间超过8个小时，那么津津就会不高兴 
	{
		sc ("%d %d",&n,&m);
		sum=n+m;
		if ((sum>=maxx) && (sum>8))
		{
			maxx=sum;
			day=i;
		}
	}
	pr ("%d",day);
	return 0;
}