#include <bits/stdc++.h>
using namespace std;
int main()
{
    int t1,t2,maxt = 0,maxd = 0;
    for (int i = 1;i <= 7;i++)
    {
        cin >>t1>>t2;
        if (t1 + t2 > maxt)
        {
            maxd = i;
            maxt = t1 + t2;
        }
    }
    cout <<maxd<<endl;
    return 0;
}