Problem:
Score : 200 points

Problem Statement

An integer X is called a Harshad number if X is divisible by f(X), where f(X) is the sum of the digits in X when written in base 10.

Given an integer N, determine whether it is a Harshad number.

Constraints

1?N?10^8

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print Yes if N is a Harshad number; print No otherwise.

Sample Input 1

12

Sample Output 1

Yes

f(12)=1+2=3. Since 12 is divisible by 3, 12 is a Harshad number.

Sample Input 2

57

Sample Output 2

No

f(57)=5+7=12. Since 57 is not divisible by 12, 12 is not a Harshad number.

Sample Input 3

148

Sample Output 3

No

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());

            Calc c = new Calc();
            int sum = c.Sum(N);
            if ((sum >= 1 && sum <= Math.Pow(10, 8)) && N % sum == 0)
            {
                Console.WriteLine("Yes");
            }
            else
            {

                Console.WriteLine("No");
            }
        }
    }
    class Calc
    {
        public int Sum(int n)
        {
            int sum = 0;
            while (n > 0)
            {
                sum += n % 10;
                n /= 10;
            }
            return sum;
        }
    }
}