using System;

public class Program

{

    public static void Main()

    {

    int n, i, tam, dem;

    Console.Write("Nhap n: ");

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

    i=0;

    tam = n%10;

    dem = 0;

    while (n!=0)

        {

        i = n%10;

        if(i>tam)

            {

            dem++;

            tam=i;

            }

        else

            {

            tam=i;

            }

        n=n/10;

        }

    if (dem == 0 ) Console.Write("So vua nhap co cac chu so tang dan tu trai qua phai");

        else Console.Write("So vua nhap KHONG co cac chu so tang dan tu trai qua phai");

    }

}