using System;

public class Program

{

    public static void Main()

    {

        int num, sum=0;

        Console.WriteLine("enter number");

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

        for(int i =1; i<num;i++)

        {

            if(num%i==0)

                sum=sum+i;

        }

        if(sum==num)

            Console.WriteLine("the number is perfect");

        else

            Console.WriteLine("the number is not perfect");

    }

}