///////lab4/////
////1
using System;
public class lab4_1
    {
        public static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());
            int sum = num % 10;
            while (num != 0)
            {
                Console.Write(num % 10 + " ");
                num = num / 10;
                if (num / 10 == 0)
                    sum += num;
            }

            Console.Write("\nСумма цифр на первом и последнем месте  = " + sum + "\n");
        }
    }


////2
using System;

    public class lab4_2
    {
        public static bool IsPerfect(int n)
        {
            int sum = 0;
            for (int i = 1; i < n; i++)
            {
                if (n % i == 0)
                    sum += i;
            }

            return sum == n;
        }

        public static void Main(string[] args)
        {
            Console.Write("a=");
            int a = int.Parse(Console.ReadLine());
            Console.Write("b=");
            int b = int.Parse(Console.ReadLine());
            for (int i = a; i <= b; i++)
            {
                if (IsPerfect(i))
                    Console.WriteLine(i);
            }
        }
    }