04. Average Grades.Broken

namespace ConsoleApplication1
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Globalization;
    using System.Numerics;

    public class ConsoleApplication1
    {
        public static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            SortedDictionary<string, double> reslut = new SortedDictionary<string, double>();

            var grades = new List<double>();

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

                var name = input[0];

                var digit = input.Skip(1).Select(double.Parse).ToArray();

                for (int j = 0; j < input.Length - 1; j++)
                {
                    grades.Add(digit[j]);
                }

                if (grades.Average() >= 5)
                {
                    double sum = grades.Average();

                    if (!reslut.ContainsKey(name))
                    {
                         reslut.Add(name, sum);
                    }
                    reslut[name] = sum;
                }

                grades.Clear();
            }

            foreach (var item in reslut)
            {
                Console.WriteLine("{0} -> {1:F2}", item.Key, item.Value);
            }
        }
    }
}