简单模拟即可

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int max = 0;
        int unhappy = 0;
        for(int i = 1;i <= 7;i++){
            int a = scanner.nextInt();
            int b = scanner.nextInt();
            if(a + b > 8 && a + b > max){
                max = a + b;
                unhappy = i;
            }
        }
        System.out.println(unhappy);
    }
}