import java.util.Scanner;
import java.lang.Math;

public class Main {
    
    public static void main(String[] args) {
        Scanner ipt = new Scanner(System.in);
        int[][] q = new int[3][7];
        int i;
        //int s, m;
        for(i = 0; i < 7; i++){
            q[0][i] = ipt.nextInt();
            q[1][i] = ipt.nextInt();
            q[2][i] = q[0][i] + q[1][i];
        }
        int max, maxvalue;
        max = 1;
        maxvalue = q[2][0];
        for(i = 1; i < 7; i++){
            if(q[2][i] > maxvalue){
                max = i + 1;
                maxvalue = q[2][i];
            }
        }
        System.out.println(max);

    }
}