using System;  

public class Exercise47

{  

    public static void Main()  

{  

    int i, n, n1, s1=0,j;  

    int fact; 

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

    Console.Write("Check whether a number is Strong Number or not:\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 a number to check whether it is Strong number: ");  

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

    n1 = n;  

    for(j=n;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("\n{0} is Strong number.\n\n", n1);  

    }  

    else  

    {  

        Console.Write("\n{0} is not Strong number.\n\n", n1);  

    }  

}  

}