using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Update();

        Square(69);

        Square(420);

    }

    static void Update()

    {

        Console.WriteLine("Yeah boi");

    }

    static int Square(int number)

    {

        int math = number * number;

        return math;

    }

}