using System;

public class Program

{

    public static void Main(int num)

    {

            num= int.Parse(Console.ReadLine());

            int digit1 = num%10;

            int digit2 = digit1;

            while(num!=0)

            {

                digit1= num%10;

                if(digit1==digit2)

                {

                    digit1=digit2;

                }

                else

                {

                    Console.WriteLine(false) ;

                }

                num/=10;

            }

            Console.WriteLine(true) ;

        }

    }

​