OpinionPoll_03

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Scanner;

public class Ex03_OpinionPoll {

    static class PersonClass {
        private String name;
        private int age;

        public PersonClass(String name, int age) {
            this.name = name;
            this.age = age;
        }

        public String getName() {
            return this.name;
        }

        public int getAge() {
            return this.age;
        }

        @Override
        public String toString() {
            return String.format( "%s - %d",
                    this.name,
                    this.age);

        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        List<PersonClass> people = new ArrayList<>();

        for (int i = 0; i < n; i++) {

            String[] input = scanner.nextLine().split(" ");

            String name = input[0];
            int age = Integer.parseInt(input[1]);
            if (age < 30) {
                continue;
            }

            PersonClass listOfPeople = new PersonClass(name, age);

            people.add(listOfPeople);

        }
        people.sort((f, s) -> f.getName().compareTo(s.getName()));


        for (int i = 0; i <people.size(); i++) {
            System.out.println(people.get(i));
        }

    }
}