12.1.1. Разминка.

import java.util.*;

public class Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        Map<Integer, Integer> map = new LinkedHashMap<>();
        int index = 0;
        int reIn = 0;
        int max = 0;
        int n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            map.put(sc.nextInt(), sc.nextInt());
        }
        for (int val : map.keySet()) {
            if (val > max && !(map.get(val) == 0)) {
                max = val;
                reIn = index;
            }
            index++;
        }
        if (!map.containsValue(1))
            System.out.println(-1);
        else System.out.println(reIn + 1);
        System.out.println(max);
    }
}