Problem:
Score : 200 points

Problem Statement

An integer N is a multiple of 9 if and only if the sum of the digits in the decimal representation of N is a multiple of 9.

Determine whether N is a multiple of 9.

Constraints

0 \leq N < 10^{200000}

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a multiple of 9, print Yes; otherwise, print No.

Sample Input 1

123456789

Sample Output 1

Yes

The sum of these digits is 1+2+3+4+5+6+7+8+9=45, which is a multiple of 9, so 123456789 is a multiple of 9.

Sample Input 2

0

Sample Output 2

Yes

Sample Input 3

31415926535897932384626433832795028841971693993751058209749445923078164062862089986280

Sample Output 3

No

Solution in C# (.NET Core 3.1.201) (judge verdict: Wrong Answer)

using System;
class Program
 {
   	static void Main(string[] args)
        {
    　　	string a = Console.ReadLine(); //標準入力
		
		int count = 0;
		for(int i = 0;i<a.Length;i++){
          count = (count + int.Parse(a.Substring(i, 1)))%9;
        }
      
  
     		Console.WriteLine("{0}", count);
        }
 
  	
	static void changev(int h){
    
  	}
 }