#include <iostream>
using namespace std;
int main()
{
    long long n;
    double max = -1;
    cin >> n;
    double *a = new double[n];
    double *p = new double[n];
    for (int i = 0; i < n; i++)
    {
        cin >> a[i] >> p[i];
        if ((a[i]*p[i])/100.0 > max)
        {
            max = a[i]*p[i]/100.0;
        }
    }
    for (int i = 0; i < n; i++)
    {
        if ((a[i] * p[i]) / 100.0 == max)
        {
            cout << i + 1;
            break;
        }
    }
    delete[] p;
    delete[] a;
    return 0;
}