#include <stdio.h>
#include <string.h>
#include <string>
#include <vector>
#include <sstream>
#include <algorithm>
#include <iostream>
#include <cmath>
#include <map>
using namespace std;

#define FOR(i,n) for (int i = 0; i < n; i++)
#define abs(x) ((x)<0?(-(x)):(x))
#define REP(i,v) for (unsigned i = 0; i < v.size(); i++)
#define RL(i,v) for (unsigned i = 0; i < v.length(); i++)
typedef long long ll;

int main()
{
#ifdef __LOCAL__
	freopen("input.in", "r", stdin);
#else
	freopen("profit.in", "r", stdin);
 	freopen("profit.out", "w", stdout);
#endif
    int N;
    double a,b;
    cin>>N>>a>>b;
    double best=a/b;
    int bestAt = 1;
    for(int i=1;i<N;i++) {
        cin>>a>>b;
        if(a/b>best) {
            best = a/b;
            bestAt = i+1;
        }
    }
    cout<<bestAt<<endl;
    return 0;
}
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