#include "iostream"

#include "algorithm"

using namespace std;

const int N = ;

struct Time

{

    int a;

    int b;

    int c;

    int d;

};

bool cmp(const Time &A,const Time &B)

{

    if(A.c > B.c)

        return ;

    if(A.c == B.c)

        return A.d < B.d;

    else

        return ;

}

int main()

{

    Time time[N];

    int i;

    for( i=;i<;i++)

    {

        cin >> time[i].a >>time[i].b;

        time[i].c = time[i].a + time[i].b;

        time[i].d = i;

    }

    sort(time,time+,cmp);

    if(time[].c > )

        cout << time[].d+;

    else

        cout << "";

    return ;

}