using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input days:");

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

        double sum;

        do{

            Console.WriteLine("Input sum:");

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

        }while(sum <= 5.0);

        double addsum = 3.0;

        double discount;

        do{

            Console.WriteLine("Input discount:");

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

        }while(discount <= 0.0 || discount >100.0);

        Console.WriteLine("Total: " + Calculate(days, sum, addsum, discount));

    }

    public static double Calculate(int days, double sum, double addsum, double discount)

    {

        double total = sum;

        for(int i = 0; i < days; i++)

        {

            total = (total + addsum)*(1+ (discount/100));

        }

        return total;

    }

    public static void DefineArr(ref int[] array)

    {

        Random rnd = new Random();

        for(int i = 0; i < array.Length; i++)

        {

            array[i] = rnd.Next(10);

        }

    }

    public static int[] DefineArr(int[] arr) //Отримує пустий масив, а повертає заповнений масив

    {

        Random rnd = new Random();

        for(int i = 0; i < arr.Length; i++)

        {

            arr[i] = rnd.Next(10);

        }

        return arr;

    }

    public static void ShowArr(int[] arr)//Заповнюємо масив числами типу int

    {

        for(int i = 0; i < arr.Length; i++)

        {

            Console.Write(arr[i] + "\t");

        }

        Console.WriteLine();

    }

}