using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    static Dictionary<int, int> Data = new();

    static void Main()

    {

        Console.WriteLine("Target?");

        int Target = int.Parse(Console.ReadLine());

        int Current = 0;

        Console.WriteLine("------------------------------");

        while (Current++ < Target)

        {

            Cal(Current);

        }

        Console.WriteLine("Find?");

        int Find = int.Parse(Console.ReadLine());

        string Result = string.Join(", ", Data.Where(x => x.Value == Find).Select(x => x.Key));

        Console.WriteLine("Result: {0}", string.IsNullOrEmpty(Result) ? "Not Found" : Result);

    }

    static void Cal(int Max)

    {

        int Key = Max;

        Console.WriteLine("Printing {0}", Max);

        int Count = 0;

        do

        {

            Count++;

            if (Max % 2 == 0)

            {

                Max /= 2;

            }

            else

            {

                Max *= 3;

                Max++;

            }

            Console.WriteLine(Max);

        } while (Max > 1);

        Console.WriteLine("------------------------------");

        Data.Add(Key, Count);

    }

}