using System.Reflection;

using System.Linq;

using System.Collections.Generic;

using System;

​

class MyDataSet {

   public static void Main()

   {

        Cluster c = new("asdf", Enumerable.Range(0, 4).Select(n => new Node(n, $"Node {n}")));

        c.PrintData();

   }

    private class Node

    {

        public int Val { get; set; }

        public string Name { get; set; }

        public Node(

            int val,

            string name

        )

        {

            Val = val;

            Name = name;

        }

    }

    private class Cluster

    {

        public string Description { get; set; }

        public List<Node> Nodes { get; set; }

        public int Size => Nodes.Count;

        public int Total => Nodes.Sum(n => n.Val);

        public Cluster(

            string description,

            IEnumerable<Node> nodes

        )

        {

            Description = description;

            Nodes = [.. nodes];

        }

​

        public void PrintData()

        {

            Console.WriteLine(Description);

            Console.WriteLine(Size);

            Console.WriteLine(Total);

            Nodes.ForEach(n => Console.WriteLine($"    {n.Name}: {n.Val}"));

        }

    }

}