using System;

public class Program

{

    public static void Main()

    {

        int p,n,roku = 1;

        while (roku <=10)

        {

            Console.WriteLine("Enter the side of the square:");

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

            p = 4 * n;

            Console.WriteLine("The perimeter of the square is: " + p);

            Console.WriteLine("Geometrical formula used: perimeter = 4n");

            Console.WriteLine(" ");

            roku++;

        }

    }

}