#include<iostream>
#include <cstdio>
using namespace std;

int main()
{
	freopen("profit.in", "r", stdin);
	freopen("profit.out", "w", stdout);
	/***
	 * ^^ dobaveno ot CodeIT ekipa za poveche teniski
	 *
	 */
	 
int N,x,y;
double max,z;
int nm=1;
cin>>N>>x>>y;
max=(double)x/(double)y;
for(int i=1;i<N;i++)
{
cin>>x>>y;
z=(double)x/(double)y;
if(max<z)
{max=z;
nm=i+1;
}
}
cout<<nm<<endl;
return 0;
}