#include<iostream>
#include<cstdio>
#include<algorithm>
#include<vector>
#include<cstring>
#include<queue>
#include<stack>
using namespace std;
long long n,a,b;
int main()
{
	//ifstream cin;
	//ofstream cout;
	//cin.open(".in");
	//cout.open(".out");
	freopen("profit.in","r",stdin);
	freopen("profit.out","w",stdout);
	scanf("%lld",&n);
	double max1=0;
	long long maxp=0;
	for(int i=1; i<=n; i++)
	{
	    scanf("%lld%lld",&a,&b);
	    if((double)a/b>max1) {max1=(double)a/b; maxp=i;}
	}
	printf("%lld\n",maxp);
	//cin.close();
	//cout.close();
	return 0;
}