using System;
using System.Collections.Generic;
using System.Linq;
class Student
{
    public string name;
    public List<double> grades = new List<double>();
    public double average;
}

class Program
{
    static void Main()
    {
        int studentsCount = int.Parse(Console.ReadLine());

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


        for (int i = 0; i < studentsCount; i++)
        {
            string[] studentData = Console.ReadLine().Split().ToArray();

            Student next = new Student();

            next.name = studentData[0];

            for (int j = 1; j < studentData.Length; j++)
            {
                next.grades.Add(Convert.ToDouble(studentData[j]));
            }

            next.average = next.grades.Average();

            if (next.average >= 5.00)
            {
                excellentStudents.Add(next);
            }
        }
        excellentStudents = excellentStudents.OrderBy(x => x.name).ThenByDescending(x => x.average).ToList();

        foreach (var baba in excellentStudents)
        {
            Console.WriteLine("{0} -> {1:f2}", baba.name, baba.average);
        }
    }
}