05. Birthday Party

import java.util.Scanner;

public class BirthdayParty {

    public static void main(String[] args) {
        Scanner scanner = new Scanner (System.in);

        double Sum = Double.parseDouble(scanner.nextLine());

        double Cake     = 0.20*Sum;
        double Drinks   = Cake-((Cake/100)*45);
        double Animator = Sum/3 ;

        System.out.print(Sum+Cake+Drinks+Animator);
    }
}