#include <iostream>
#include <cstdio>

using namespace std;

int N;
int a, b, res =-1;

int main(){
    freopen ( "profit.in", "r", stdin );
    freopen ( "profit.out", "w", stdout );

    cin >> N;
    b = 10;
    for ( int i = 0; i < N; ++i ){
        int x, y;
        cin >> x >> y;
        if ( a*y < x*b ){
            a = x;
            b = y;
            res = i + 1;
        }
    }

    cout << res << endl;
}
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