#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; }

#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, id;
double maxx;

signed main() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		double x, y;
		cin >> x >> y;
		if (y / x > maxx) {
			maxx = y / x;
			id = i;
		}
	}
	cout << id;
	return 0;
}