using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Enter the quantity of the product: ");

        int Quantity = Convert.ToInt32(Console.ReadLine());

        // Quantity < 10

        if (Quantity < 10)

        {

            if (Quantity < 50)

            {

                if (Quantity < 100)

                {

                    Console.WriteLine("Discount: 5%");

                }

            }

        }

        // Quantity < 50

        else

        {

            if (Quantity < 50)

            {

                if (Quantity < 100)

                {

                    Console.WriteLine("Discount: 10%");

                }

            }

            // Quantity < 100

            else

            {

                if (Quantity < 100)

                {

                    Console.WriteLine("Discount: 15%");

                }

                else

                {

                    Console.WriteLine("Discount: 20%");

                }

            }

        }

    }

}