using System;
using System.Collections.Generic;
using System.Linq;

namespace _4.Average_Grades
{
    public class Program
    {
        public static void Main()
        {
            var countOfStudents = int.Parse(Console.ReadLine());
            var studentsAndGrades = new List<Student>();

            for (int i = 0; i < countOfStudents; i++)
            {
                var studentAndHisGrades = Console.ReadLine().Split(' ').ToList();
                var student = new Student();
                student.Name = studentAndHisGrades[0];
                studentAndHisGrades.Remove(student.Name);
                var grades = studentAndHisGrades.Select(double.Parse).ToArray();
                student.AvarageGrade = grades.Average();

                if (student.AvarageGrade >= 5.50)
                {
                    studentsAndGrades.Add(student);
                }
            }

            foreach (var student in studentsAndGrades.OrderBy(student => student.Name).ThenByDescending(student => student.AvarageGrade))
            {
                Console.WriteLine($"{student.Name} -> {student.AvarageGrade:f2}");
            }
        }
    }

    public class Student
    {
        public string Name { get; set; }
        public double AvarageGrade { get; set; }
    }
}