using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            List<Person> people = new List<Person>();

            for (int i = 1; i <= n; i++)
            {
                string input = Console.ReadLine();
                string name = input.Split(" ")[0];
                int age = int.Parse(input.Split(" ")[1]);
                Person person = new Person(name, age);
                people.Add(person);
            }

            Dictionary<string, int> peopleOver30 = new Dictionary<string, int>();
            foreach(Person person in people)
            {
                if(person.Age > 30)
                {
                    peopleOver30.Add(person.Name, person.Age);
                }
            }

            peopleOver30 = peopleOver30
                .OrderBy(pair => pair.Key)
                .ToDictionary(pair => pair.Key, pair => pair.Value);

            //peopleOver30.Select(pair => $"{pair.Key} - {pair.Value}").ToList().ForEach(Console.WriteLine);

            foreach (var pair in peopleOver30)
            {
                Console.WriteLine(pair.Key + " - " + pair.Value);
            }


        }
    }
}