4. Average Grades

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

namespace Task4AverageGrades
{
    class Student
    {
        public string Name { get; set; }
        public double[] Grades { get; set; }
        public double Average
        {
            get
            {
                return Grades.Average();
            }
        }
    }
    class Task4AverageGrades
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            List<Student> students = new List<Student>();

            while (n-- > 0)
            {
                var input = Console.ReadLine().Split(' ');
                string name = input[0];
                var grades = input.Skip(1).Select(double.Parse).ToArray();
                Student student = new Student();
                student.Name = name;
                student.Grades = grades;

                students.Add(student);
            }
            students = students
                .Where(s => s.Average >= 5.00)
                .OrderBy(s => s.Name)
                .ThenByDescending(s => s.Average).ToList();

            foreach ( var s in students)
            {
                Console.WriteLine($"{s.Name} -> {s.Average:F2}");

            }

        }
    }
}