#include <bits/stdc++.h> using namespace std;

int main() { double m, n, a, b, s; cin >> n; m = 0; for (int i = 1; i <= n; i++) { cin >> a >> b; if (m < b / a||(m==b/a&&i<s)) { m = b / a; s = i; } } cout << s; return 0; }