Average Grades

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

namespace _4.Average_Grades
{
    public class Student
    {
        public string name { get; set; }
        public List<double> grades { get; set;}
        public double averageGrade { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var listStudents = new List<Student>();
            for (int i = 0; i < n; i++)
            {
                listStudents.Add(new Student());
            }

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

                listStudents[i].name = input[0];
                listStudents[i].grades = new List<double>();
                for (int f = 1; f < input.Length; f++)
                {
                    listStudents[i].grades.Add(double.Parse(input[f]));
                }
                listStudents[i].averageGrade = listStudents[i].grades.Average();
            }
            List<Student> exellentGrades = new List<Student>();
            foreach (var item in listStudents)
            {
                if (item.averageGrade>=5)
                {
                    exellentGrades.Add(item);
                }
            }
            foreach (var item in exellentGrades.OrderBy(x=>x.name).ThenBy(x=>-x.averageGrade))
            {
                Console.WriteLine("{0} -> {1:f2}",item.name,item.averageGrade);
            }
        }
    }
}