Whatever

namespace _4.AverageGrades
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    public class Program
    {
        public static void Main(string[] args)
        {
            var number = int.Parse(Console.ReadLine());
            var studentByAverageGrade = new Dictionary<string, double>();
            var count = 0;
            List<string> names = new List<string>();

            while (number > 0)
            {
                var input = Console.ReadLine().Split().ToArray();

                var grades = new double[input.Length - 1];

                names.Insert(count, input[0]);

                for (int i = 1; i < input.Length; i++)
                {
                    grades[i - 1] = double.Parse(input[i]);
                }
                Student student = new Student(input[0], grades);

                studentByAverageGrade[names[count]] = grades.Average();

                number--;
                count++;
            }

            foreach (var student in studentByAverageGrade.OrderBy(x => x.Key).ThenBy(x => x.Value))
            {
                if (student.Value > 5.00)
                {
                    Console.WriteLine($"{student.Key} -> {student.Value:F2}");
                }
            }
        }
    }
}