using System;

//Write a program that applies bonus score to given score in the range [1…9] by the following rules:
//•	If the score is between 1 and 3, the program multiplies it by 10.
//•	If the score is between 4 and 6, the program multiplies it by 100.
//•	If the score is between 7 and 9, the program multiplies it by 1000.
//•	If the score is 0 or more than 9, the program prints “invalid score”.

class BonusScore
{
    static void Main()
    {
        Console.Write("Enter a number from 1 to 9: ");
        int n = int.Parse(Console.ReadLine());
        if (n>=1 && n<=9)
        {
            if (n>=1 && n<=3)
            {
                Console.WriteLine(n*10);
            }
            else if (n>=4 && n<=6)
            {
                Console.WriteLine(n*100); 
            }
            else if (n>=7 && n<=9)
            {
                Console.WriteLine(n*1000);
            }
        }
        else
            Console.WriteLine("invalid score");
    }
}