#include <iostream>
#include <algorithm>

using namespace std;

bool cmp(int a, int b) {
    return a > b;
}

int main(int argc, char const *argv[]) {
    int weekSchedule[7][2], dayTotLearnTime[7], compTempArray[7];
    for (auto &i: weekSchedule) {
        for (int &j: i) {
            cin >> j;
        }
    }
    for (int i = 0; i < 7; ++i) {
        dayTotLearnTime[i] = weekSchedule[i][0] + weekSchedule[i][1];
    }
    copy(begin(dayTotLearnTime), end(dayTotLearnTime),
         begin(compTempArray));
    sort(compTempArray, compTempArray + 7, cmp);
    for (int i = 0; i < 7; ++i) {
        if (compTempArray[0] == dayTotLearnTime[i]) {
            cout << i;
        }
    }
    return 0;
}