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

namespace _04.Average_Grades
{
    class Student
    {
        public string Name { get; set; }

        public List<double> Grades { get; set; }

        public double AverageGrades { get; set; }
    }



    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            List<Student> allStudents = new List<Student>();


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


                if (oneStudent.AverageGrades >=5.00)
                {
                    allStudents.Add(oneStudent);

                }


            }





            allStudents = allStudents.OrderBy(x => x.Name).ThenByDescending(x => x.AverageGrades).ToList();

            for (int i = 0; i < allStudents.Count; i++)
            {


                Console.WriteLine(string.Join(Environment.NewLine, allStudents[i].Name)+" -> "+
                    string.Join(Environment.NewLine, $"{allStudents[i].AverageGrades:F2}"));


            }


        }

        static Student ReadStudent ()
        {
           List<string> inputStudent = Console.ReadLine().Split(' ').ToList();

            string name = inputStudent[0];
            inputStudent.RemoveAt(0);
            Student oneStudent = new Student
            {
                Name = name,


                Grades = inputStudent.Select(double.Parse).ToList(),

                AverageGrades = inputStudent.Select(double.Parse).Average()

            };





            return oneStudent;
        }




    }
}