using System;

public class Program

{

    public static void Main()

    {

        /*

        Console.WriteLine("Guess a number between 1 and 20");

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

        Random rnd = new Random();

        int rndNumber = rnd.Next(1,21);

        while(guess != rndNumber)

        {

            if(guess > rndNumber)

            {

                Console.WriteLine("Too high.");

            }

            else if(guess < rndNumber)

            {

                Console.WriteLine("Too low.");

            }

            guess = Convert.ToInt32(Console.ReadLine());

        }

        Console.WriteLine("You got it");

        */

        /*

        Console.WriteLine("Enter a number.");

        double xValue = Convert.ToDouble(Console.ReadLine());

        while(xValue > 0) 

        {

            Console.WriteLine(xValue);

            xValue -= 0.5;

        }

        */

        /*

        int year = 2018;

        int counter = 0;

        while(counter < 50)

        {

            if (((year % 4 == 0) || (year % 400 == 0)) && (year % 100 != 0))

            {

                Console.WriteLine(year);

                counter++;

            }

            year++;

        }

        */

        int odd = 1;

        while(odd % 2 != 0 && odd <= 25 && odd > 0)

        {

            Console.WriteLine(odd * odd);

            odd++;

        }

    }

}