Average student grades - Nested dictionariues

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

namespace Average_student_grades
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, List<double>> students = new Dictionary<string, List<double>>();
            int cnt = int.Parse(Console.ReadLine());

            for (int i = 0; i < cnt; i++)
            {
                string[] input = Console.ReadLine().Split(' ').ToArray();
                string name = input[0];
                double grade = double.Parse(input[1]);

                if (!students.ContainsKey(name))
                {
                    students.Add(name, new List<double>());
                }
                students[name].Add(grade);
            }
            foreach (KeyValuePair<string, List<double>> student in students)
            {
                string printName = student.Key;
                List<double> grades = student.Value;
                double avg = grades.Average();
                Console.Write($"{printName} -> ");

                foreach (double grade in grades)
                {
                    Console.Write($"{grade:f2} ");
                }
                Console.WriteLine($"(avg: {avg:f2})");
            }
        }
    }
}