06. Strong number

using System;

namespace StrongNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            string strNum = Console.ReadLine();
            int number = int.Parse(strNum);
            int sum = 0;

            for (int i = 1; i <= strNum.Length; i++)
            {
                int factorial = 1;
                for (int j = 1; j <= number % 10; j++)
                {
                    factorial *= j;
                }
                sum += factorial;
                number /= 10;
            }

            Console.WriteLine(int.Parse(strNum) == sum ? "yes" : "no");
        }
    }
}