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

namespace AverageGrades
{
    //Judge 50/100
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            List<Student> register = new List<Student>();

            for (int i = 0; i < n; i++)
            {
                string[] tokens = Console.ReadLine().Split();
                string tempName = tokens[0];
                double[] tempRegister = new double[tokens.Length - 1];

                for (int el = 1; el < tokens.Length; el++)
                {
                    tempRegister[el - 1] = double.Parse(tokens[el]);
                }
                Student student = new Student(tempName, tempRegister, tempRegister.Average());
                register.Add(student);
            }

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

            foreach (Student student in register.Where(x => x.Average > 5.00)
                .OrderBy(x => x.Name)
                .ThenBy(x => -x.Average))
            {
                topStudents.Add(student);
            }
            foreach (Student student in topStudents)
            {
                Console.WriteLine($"{student.Name} -> {student.Average:f2}");
            }
        }
    }
    class Student
    {
        public Student(string name, double[] grades, double average)
        {
            Name = name;
            Grades = grades;
            Average = average;
        }

        public string Name { get; set; }

        public double[] Grades { get; set; }

        public double Average { get; set; }
    }
}