using System;

public class Program

{

    public static void Main()

    {

        double num , nkdan , kast ;

        //------------------------------------

        num=double.Parse(Console.ReadLine());

        //------------------------------------

        nkdan=num/2;

        kast=nkdan/5;

        //------------------------------------

        Console.WriteLine("nkdan : {0}",nkdan);

        Console.WriteLine("kast : {0}",kast);

    }

}