#include<cstdio>
#include<bits/stdc++.h>
using namespace std;
struct student
{
    int t;
    int h;
    double v;
    int l;
};
bool cmp(student x,student y)
{
    if(x.v!=y.v)
    {
        return x.v>y.v;
    }
    if(x.h==y.h)
    {
        return x.l>y.l;
    }   
}
int main()
{
int x;
cin>>x;
student a[x];
for(int i=0;i<x;i++)
{
    cin>>a[i].t>>a[i].h;
    a[i].v=a[i].h/a[i].t;
    a[i].l=i;
}
sort(a,a+x,cmp);
cout<<a[0].l+1;
    return 0;
}