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

namespace _04.Average_Grades
{
    class Program
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            var finalResult = new List<Student>();

            for (int i = 0; i < n; i++)
            {
                var inputData = Console.ReadLine().Split(' ');

                var currentStudent = new Student
                {
                    Name = inputData[0],
                    Grades = inputData.Skip(1).Select(double.Parse).ToArray(),
                };

                if (currentStudent.AverageGrade >= 5.00)
                {
                    finalResult.Add(currentStudent);
                }
            }

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

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

        public double[] Grades { get; set; }

        public double AverageGrade => this.Grades.Average();
    }
}