#include <iostream>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <iomanip>
using namespace std;
int A[11000];
int B[11000];
int C[11000];
int main()
{
	int n,i,sum = 0,cnt = 0;
	cin >> n;
	for(i = 1;i <= 7;i++)
	{
		cin >> A[i] >> B[i];
		C[i] = A[i] + B[i];
	} 
	for(i = 1;i <= 7;i++)
	{
		if(C[i] > 8)
		{
			if(C[i] > cnt)
			{
				sum = i;
				cnt = C[i];
			}
		}
	}
	cout << sum;
	return 0;
}