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# (Mono-mcs 6.8.0.105) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AtCoder176
{
    class Program
    {
        static void Main(string[] args)
        {
            QB();
        }

        static void QA()
        {
            string line = Console.ReadLine();
            string[] splited = line.Split(' ');
            int N = int.Parse(splited[0]);
            int X = int.Parse(splited[1]);
            int T = int.Parse(splited[2]);

            Console.WriteLine(Math.Ceiling((double)N / X) * T);
        }

        static void QB()
        {
            string line = Console.ReadLine();
            long l = 0;
            foreach(char c in line)
            {
                l += short.Parse(c.ToString());
            }
            Console.WriteLine((l % 9 == 0) ? "YES" : "NO");
        }
    }
}