/*
欧拉计划第99题
*/
#include<bits/stdc++.h>
using namespace std;
int main(void)
{
int i = 0, ans = 0;
double a, b, maxv = 0;
while (scanf("%lf,%lf", &a, &b) != EOF)
{
i ++;
if (b * log(a) > maxv)
{
ans = i;
maxv = b * log(a);
}
}
cout << ans << endl;
return 0;
}