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;
class Program
{
  static void Main(string[] args)
  {
    // スペース区切りの整数の入力
    string[] input = Console.ReadLine().Split(' ');
    int _N = int.Parse(input[0]);

    int digit = (_N == 0) ? 1 : ((int)Math.Log10(_N) + 1);
    
    int num = 0;
    for (int i=0;i<digit;i++){
      num += (_N % (int)Math.Pow(10,i+1) ) / (int)Math.Pow(10,i);
    }

    if (_N % num==0){
        Console.WriteLine("Yes");
      }else{
        Console.WriteLine("No");
      }
    
  }
}