using System;

public class Program

{

    public static void Main()

    {

        int[] myArray = new int[]{5,7,42, 77, 46,55};

        int product = 1;

        foreach (int x in myArray){

            product = x * product;

        }

        Console.WriteLine(product);

        int[,] myOtherArray = {{3, 4}, {17, 15}, {3, 6}};

        Console.WriteLine(myOtherArray[2, 1]);

        int[][]jaggedArray = new int[][]

        {

            new int []{15, 26, 33},

            new int []{45, 66, 23},

            new int []{77, 44}

        };

        string magicnumber = Convert.ToString(Console.ReadLine());

            Console.WriteLine(magicnumber.Length);

            }

        }