#include<bits/stdc++.h>
using namespace std;

int main() {
    int time[7][2], anger = 8, day = 0;
    for (int i = 0; i < 7; i++) {
        cin >> time[i][0] >> time[i][1];
        if (time[i][0] + time[i][1] > anger) {
            anger = time[i][0] + time[i][1];
            day = i + 1;
        }
    }
    cout << day;
    return 0;
}