using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("By Brandon Eduardo Cortes Correa");

        Console.WriteLine("");

           int i, n1, s1=0,j,k,en,sn;  

    int fact; 

    Console.Write("\n\n");

    Console.Write("Find Strong Numbers within a range of numbers:\n");

    Console.Write("------------------------------------------------");

    Console.Write("\n\n");  

​

​

/* If sum of factorial of digits is equal to original number then it is Strong number */

    Console.Write("Input starting range of number : ");  

    sn = Convert.ToInt32(Console.ReadLine());   

    Console.Write("Input ending range of number: ");  

    en = Convert.ToInt32(Console.ReadLine());   

    Console.Write("\n\nThe Strong numbers are :\n"); 

​

 for(k=sn;k<=en;k++)

   {

     n1=k;

     s1=0;  

    for(j=k;j>0;j=j/10) 

    {  

        fact = 1;  

          for(i=1; i<=j % 10; i++)  

           {  

            fact = fact * i;  

           }  

            s1 = s1 + fact;  

    }  

    if(s1==n1)  

        Console.Write("{0}  ", n1); 

  }  

        Console.Write("\n\n"); 

}  

}